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      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269760:444</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269760:444</TITLE>
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          <SINGLE/>
        </LIBRARY_LAYOUT>
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        <VALUE>Illumina</VALUE>
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      </EXPERIMENT_ATTRIBUTE>
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        <TAG>experiment_design_description</TAG>
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        <VALUE>444</VALUE>
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        <TAG>target_gene</TAG>
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        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
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    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269762:472</TITLE>
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      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
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        <IDENTIFIERS>
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          <SINGLE/>
        </LIBRARY_LAYOUT>
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        <TAG>experiment_title</TAG>
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        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
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      </EXPERIMENT_ATTRIBUTE>
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      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
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        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
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        <TAG>region</TAG>
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      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
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        <TAG>num_sequences</TAG>
        <VALUE>68704</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
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      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>472</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
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      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
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      <PRIMARY_ID>ERX520177</PRIMARY_ID>
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      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269763:334</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269763:334</TITLE>
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      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
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        <IDENTIFIERS>
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          <SINGLE/>
        </LIBRARY_LAYOUT>
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        <TAG>sample_center</TAG>
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      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
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        <TAG>region</TAG>
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      <EXPERIMENT_ATTRIBUTE>
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        <VALUE>Cornell</VALUE>
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        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
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        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
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      <EXPERIMENT_ATTRIBUTE>
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        <VALUE>334</VALUE>
      </EXPERIMENT_ATTRIBUTE>
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        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
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        <VALUE>2/4/13</VALUE>
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      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
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        <TAG>region</TAG>
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      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
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        <VALUE>55976</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>493</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
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      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269861:381</SUBMITTER_ID>
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    <TITLE>unspecified sequencing; qiime_experiment_2401:1269861:381</TITLE>
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        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
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          <SINGLE/>
        </LIBRARY_LAYOUT>
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        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
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        <TAG>experiment_title</TAG>
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      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>76544</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>381</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269306:394" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520270">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520270</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269306:394</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269306:394</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269306:394</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.30" accession="ERS501784" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501784</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635430</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.30</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.30:394</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83537</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>394</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269307:217" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520271">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520271</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269307:217</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269307:217</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269307:217</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.18" accession="ERS501785" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501785</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635431</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.18</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.18:217</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69737</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>217</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269308:206" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520272">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520272</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269308:206</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269308:206</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269308:206</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.74" accession="ERS501786" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501786</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635432</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.74</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.74:206</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>2</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>206</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269310:22" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520273">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520273</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269310:22</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269310:22</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269310:22</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.40" accession="ERS501788" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501788</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635434</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.40</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.40:22</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>60045</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>22</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269311:62" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520274">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520274</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269311:62</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269311:62</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269311:62</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.90" accession="ERS501789" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501789</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635435</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.90</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.90:62</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69283</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>62</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269496:331" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520451">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520451</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269496:331</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269496:331</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269496:331</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.51" accession="ERS501974" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501974</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635620</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.51</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.51:331</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>65788</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>331</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269497:498" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520452">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520452</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269497:498</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269497:498</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269497:498</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.83" accession="ERS501975" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501975</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635621</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.83</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.83:498</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74508</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>498</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269498:282" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520453">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520453</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269498:282</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269498:282</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269498:282</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.87" accession="ERS501976" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501976</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635622</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.87</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.87:282</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>84105</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>282</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269499:43" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520454">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520454</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269499:43</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269499:43</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269499:43</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.65" accession="ERS501977" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501977</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635623</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.65</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.65:43</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>97813</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>43</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269500:165" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520455">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520455</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269500:165</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269500:165</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269500:165</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.34" accession="ERS501978" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501978</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635624</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.34</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.34:165</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>165</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269501:430" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520456">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520456</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269501:430</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269501:430</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269501:430</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.75" accession="ERS501979" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501979</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635625</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.75</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.75:430</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>88918</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>430</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269595:474" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520547">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520547</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269595:474</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269595:474</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269595:474</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.4" accession="ERS502073" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502073</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635719</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.4</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.4:474</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>108049</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>474</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269596:319" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520548">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520548</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269596:319</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269596:319</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269596:319</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.39" accession="ERS502074" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502074</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635720</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.39</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.39:319</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>61117</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>319</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269597:535" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520549">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520549</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269597:535</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269597:535</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269597:535</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.6" accession="ERS502075" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502075</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635721</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.6</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.6:535</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>44261</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>535</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269598:506" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520550">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520550</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269598:506</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269598:506</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269598:506</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.20" accession="ERS502076" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502076</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635722</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.20</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.20:506</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>89545</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>506</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269599:372" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520551">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520551</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269599:372</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269599:372</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269599:372</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.92" accession="ERS502077" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502077</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635723</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.92</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.92:372</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77993</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>372</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269600:500" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520552">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520552</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269600:500</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269600:500</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269600:500</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.88" accession="ERS502078" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502078</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635724</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.88</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.88:500</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>50975</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>500</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269701:354" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520643">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520643</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269701:354</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269701:354</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269701:354</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.74" accession="ERS502179" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502179</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635825</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.74</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.74:354</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>88934</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>354</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269702:209" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520644">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520644</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269702:209</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269702:209</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269702:209</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.1" accession="ERS502180" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502180</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635826</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.1</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.1:209</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>75958</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>209</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269703:235" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520645">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520645</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269703:235</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269703:235</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269703:235</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.38" accession="ERS502181" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502181</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635827</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.38</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.38:235</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71068</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>235</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269704:325" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520646">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520646</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269704:325</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269704:325</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269704:325</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.44" accession="ERS502182" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502182</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635828</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.44</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.44:325</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70402</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>325</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269705:221" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520647">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520647</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269705:221</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269705:221</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269705:221</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.23" accession="ERS502183" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502183</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635829</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.23</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.23:221</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>80843</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>221</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269706:246" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520648">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520648</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269706:246</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269706:246</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269706:246</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.50" accession="ERS502184" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502184</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635830</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.50</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.50:246</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82888</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>246</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269765:295" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520179">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520179</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269765:295</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269765:295</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269765:295</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.14" accession="ERS501687" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501687</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635333</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.14</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.14:295</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>65436</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>295</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269766:236" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520180">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520180</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269766:236</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269766:236</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269766:236</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.39" accession="ERS501688" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501688</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635334</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.39</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.39:236</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74885</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>236</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269767:172" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520181">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520181</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269767:172</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269767:172</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269767:172</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.42" accession="ERS501689" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501689</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635335</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.42</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.42:172</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>172</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269768:482" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520182">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520182</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269768:482</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269768:482</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269768:482</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.48" accession="ERS501690" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501690</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635336</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.48</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.48:482</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>76400</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>482</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269769:373" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520183">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520183</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269769:373</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269769:373</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269769:373</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.93" accession="ERS501691" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501691</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635337</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.93</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.93:373</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74579</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>373</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269770:348" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520184">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520184</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269770:348</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269770:348</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269770:348</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.69" accession="ERS501692" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501692</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635338</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.69</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.69:348</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77199</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>348</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269312:107" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520275">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520275</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269312:107</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269312:107</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269312:107</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.54" accession="ERS501790" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501790</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635436</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.54</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.54:107</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>53669</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>107</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269313:125" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520276">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520276</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269313:125</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269313:125</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269313:125</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.79" accession="ERS501791" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501791</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635437</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.79</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.79:125</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>40235</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>125</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269314:413" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520277">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520277</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269314:413</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269314:413</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269314:413</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.57" accession="ERS501792" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501792</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635438</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.57</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.57:413</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>90397</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>413</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269315:408" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520278">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520278</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269315:408</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269315:408</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269315:408</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.51" accession="ERS501793" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501793</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635439</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.51</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.51:408</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>93878</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>408</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269316:438" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520279">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520279</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269316:438</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269316:438</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269316:438</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.83" accession="ERS501794" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501794</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635440</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.83</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.83:438</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74367</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>438</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269317:253" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520280">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520280</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269317:253</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269317:253</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269317:253</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.57" accession="ERS501795" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501795</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635441</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.57</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.57:253</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>75113</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>253</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269408:425" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520365">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520365</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269408:425</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269408:425</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269408:425</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.70" accession="ERS501886" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501886</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635532</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.70</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.70:425</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>92090</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>425</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269409:553" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520366">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520366</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269409:553</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269409:553</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269409:553</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.9" accession="ERS501887" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501887</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635533</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.9</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.9:553</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>104421</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>553</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269502:242" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520457">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520457</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269502:242</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269502:242</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269502:242</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.45" accession="ERS501980" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501980</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635626</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.45</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.45:242</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>85750</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>242</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269503:417" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520458">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520458</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269503:417</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269503:417</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269503:417</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.61" accession="ERS501981" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501981</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635627</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.61</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.61:417</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>75829</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>417</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269504:313" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520459">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520459</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269504:313</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269504:313</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269504:313</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.31" accession="ERS501982" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501982</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635628</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.31</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.31:313</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71365</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>313</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269505:192" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520460">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520460</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269505:192</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269505:192</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269505:192</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.61" accession="ERS501983" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501983</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635629</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.61</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.61:192</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>192</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269506:302" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520461">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520461</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269506:302</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269506:302</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269506:302</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.20" accession="ERS501984" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501984</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635630</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.20</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.20:302</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>79782</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>302</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269507:38" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520462">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520462</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269507:38</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269507:38</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269507:38</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.60" accession="ERS501985" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501985</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635631</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.60</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.60:38</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78788</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>38</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269601:85" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520553">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520553</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269601:85</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269601:85</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269601:85</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.27" accession="ERS502079" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502079</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635725</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.27</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.27:85</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64733</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>85</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269602:7" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520554">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520554</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269602:7</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269602:7</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269602:7</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.2" accession="ERS502080" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502080</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635726</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.2</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.2:7</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74718</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>7</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269604:224" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520555">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520555</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269604:224</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269604:224</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269604:224</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.27" accession="ERS502082" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502082</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635728</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.27</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.27:224</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>67649</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>224</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269605:26" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520556">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520556</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269605:26</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269605:26</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269605:26</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.46" accession="ERS502083" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502083</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635729</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.46</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.46:26</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64678</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>26</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269606:497" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520557">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520557</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269606:497</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269606:497</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269606:497</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.8" accession="ERS502084" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502084</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635730</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.8</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.8:497</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>112316</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>497</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269607:383" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520558">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520558</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269607:383</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269607:383</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269607:383</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.19" accession="ERS502085" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502085</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635731</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.19</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.19:383</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>87567</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>383</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269707:365" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520649">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520649</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269707:365</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269707:365</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269707:365</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.84" accession="ERS502185" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502185</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635831</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.84</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.84:365</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>87870</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>365</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269709:358" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520650">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520650</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269709:358</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269709:358</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269709:358</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.78" accession="ERS502187" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502187</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635833</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.78</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.78:358</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>59402</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>358</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269710:57" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520651">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520651</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269710:57</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269710:57</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269710:57</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.81" accession="ERS502188" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502188</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635834</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.81</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.81:57</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>93306</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>57</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269711:323" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520652">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520652</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269711:323</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269711:323</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269711:323</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.42" accession="ERS502189" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502189</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635835</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.42</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.42:323</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>75496</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>323</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269712:511" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520653">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520653</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269712:511</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269712:511</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269712:511</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.27" accession="ERS502190" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502190</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635836</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.27</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.27:511</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>81643</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>511</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269713:271" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520654">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520654</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269713:271</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269713:271</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269713:271</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.76" accession="ERS502191" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502191</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635837</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.76</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.76:271</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>81248</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>271</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269771:439" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520185">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520185</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269771:439</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269771:439</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269771:439</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.84" accession="ERS501693" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501693</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635339</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.84</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.84:439</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>105823</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>439</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269772:393" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520186">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520186</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269772:393</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269772:393</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269772:393</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.3" accession="ERS501694" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501694</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635340</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.3</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.3:393</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>114651</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>393</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269773:357" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520187">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520187</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269773:357</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269773:357</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269773:357</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.77" accession="ERS501695" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501695</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635341</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.77</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.77:357</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71614</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>357</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269774:494" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520188">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520188</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269774:494</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269774:494</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269774:494</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.7" accession="ERS501696" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501696</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635342</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.7</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.7:494</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>124297</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>494</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269775:138" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520189">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520189</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269775:138</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269775:138</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269775:138</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.95" accession="ERS501697" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501697</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635343</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.95</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.95:138</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>38849</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>138</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269776:179" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520190">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520190</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269776:179</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269776:179</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269776:179</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.5" accession="ERS501698" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501698</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635344</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.5</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.5:179</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>2</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>179</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269318:96" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520281">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520281</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269318:96</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269318:96</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269318:96</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.40" accession="ERS501796" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501796</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635442</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.40</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.40:96</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>81918</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>96</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269319:258" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520282">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520282</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269319:258</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269319:258</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269319:258</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.63" accession="ERS501797" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501797</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635443</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.63</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.63:258</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82649</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>258</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269320:260" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520283">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520283</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269320:260</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269320:260</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269320:260</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.65" accession="ERS501798" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501798</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635444</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.65</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.65:260</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>79868</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>260</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269321:168" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520284">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520284</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269321:168</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269321:168</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269321:168</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.38" accession="ERS501799" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501799</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635445</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.38</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.38:168</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>168</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269322:450" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520285">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520285</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269322:450</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269322:450</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269322:450</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.11" accession="ERS501800" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501800</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635446</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.11</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.11:450</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>90518</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>450</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269323:467" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520286">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520286</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269323:467</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269323:467</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269323:467</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.31" accession="ERS501801" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501801</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635447</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.31</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.31:467</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>110545</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>467</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269410:281" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520367">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520367</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269410:281</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269410:281</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269410:281</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.86" accession="ERS501888" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501888</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635534</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.86</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.86:281</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>84409</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>281</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269411:11" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520368">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520368</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269411:11</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269411:11</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269411:11</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.26" accession="ERS501889" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501889</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635535</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.26</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.26:11</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>88712</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>11</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269412:256" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520369">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520369</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269412:256</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269412:256</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269412:256</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.61" accession="ERS501890" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501890</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635536</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.61</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.61:256</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>42267</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>256</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269413:509" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520370">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520370</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269413:509</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269413:509</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269413:509</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.25" accession="ERS501891" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501891</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635537</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.25</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.25:509</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>110699</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>509</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269414:315" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520371">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520371</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269414:315</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269414:315</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269414:315</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.33" accession="ERS501892" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501892</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635538</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.33</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.33:315</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>80218</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>315</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269415:233" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520372">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520372</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269415:233</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269415:233</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269415:233</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.35" accession="ERS501893" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501893</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635539</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.35</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.35:233</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71589</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>233</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269508:12" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520463">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520463</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269508:12</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269508:12</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269508:12</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.27" accession="ERS501986" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501986</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635632</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.27</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.27:12</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>72438</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>12</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269509:294" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520464">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520464</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269509:294</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269509:294</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269509:294</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.13" accession="ERS501987" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501987</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635633</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.13</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.13:294</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>66541</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>294</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269510:406" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520465">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520465</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269510:406</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269510:406</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269510:406</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.5" accession="ERS501988" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501988</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635634</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.5</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.5:406</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>104062</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>406</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269511:279" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520466">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520466</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269511:279</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269511:279</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269511:279</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.83" accession="ERS501989" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501989</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635635</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.83</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.83:279</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>81676</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>279</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269512:135" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520467">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520467</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269512:135</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269512:135</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269512:135</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.91" accession="ERS501990" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501990</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635636</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.91</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.91:135</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>60968</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>135</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269513:16" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520468">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520468</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269513:16</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269513:16</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269513:16</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.33" accession="ERS501991" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501991</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635637</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.33</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.33:16</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74808</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>16</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269608:533" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520559">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520559</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269608:533</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269608:533</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269608:533</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.58" accession="ERS502086" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502086</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635732</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.58</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.58:533</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82566</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>533</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269609:351" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520560">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520560</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269609:351</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269609:351</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269609:351</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.71" accession="ERS502087" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502087</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635733</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.71</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.71:351</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>92136</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>351</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269718:31" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520659">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520659</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269718:31</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269718:31</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269718:31</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.53" accession="ERS502196" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502196</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635842</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.53</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.53:31</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69146</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>31</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269719:363" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520660">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520660</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269719:363</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269719:363</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269719:363</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.82" accession="ERS502197" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502197</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635843</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.82</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.82:363</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>65023</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>363</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269778:13" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520191">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520191</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269778:13</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269778:13</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269778:13</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.28" accession="ERS501700" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501700</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635346</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.28</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.28:13</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>95709</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269779:245" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520192">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520192</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269779:245</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269779:245</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269779:245</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.49" accession="ERS501701" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501701</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635347</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.49</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.49:245</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>114337</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>245</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269780:501" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520193">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520193</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269780:501</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269780:501</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269780:501</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.89" accession="ERS501702" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501702</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635348</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.89</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.89:501</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>42777</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>501</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269781:84" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520194">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520194</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269781:84</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269781:84</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269781:84</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.26" accession="ERS501703" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501703</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635349</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.26</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.26:84</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>57327</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>84</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269782:129" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520195">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520195</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269782:129</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269782:129</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269782:129</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.83" accession="ERS501704" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501704</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635350</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.83</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.83:129</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>56709</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>129</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269783:117" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520196">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520196</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269783:117</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269783:117</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269783:117</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.66" accession="ERS501705" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501705</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635351</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.66</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.66:117</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>58217</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>117</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269324:332" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520287">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520287</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269324:332</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269324:332</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269324:332</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.52" accession="ERS501802" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501802</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635448</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.52</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.52:332</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77149</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>332</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269325:69" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520288">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520288</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269325:69</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269325:69</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269325:69</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.10" accession="ERS501803" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501803</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635449</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.10</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.10:69</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>51593</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>69</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269326:309" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520289">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520289</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269326:309</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269326:309</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269326:309</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.28" accession="ERS501804" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501804</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635450</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.28</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.28:309</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>76061</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>309</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269327:453" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520290">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520290</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269327:453</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269327:453</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269327:453</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.16" accession="ERS501805" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501805</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635451</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.16</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.16:453</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>38581</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>453</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269328:324" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520291">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520291</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269328:324</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269328:324</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269328:324</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.43" accession="ERS501806" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501806</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635452</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.43</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.43:324</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>61624</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>324</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269329:525" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520292">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520292</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269329:525</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269329:525</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269329:525</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.46" accession="ERS501807" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501807</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635453</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.46</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.46:525</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>72042</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>525</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269416:539" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520373">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520373</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269416:539</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269416:539</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269416:539</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.64" accession="ERS501894" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501894</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635540</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.64</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.64:539</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>76183</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>539</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269417:412" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520374">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520374</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269417:412</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269417:412</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269417:412</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.55" accession="ERS501895" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501895</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635541</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.55</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.55:412</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>80146</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>412</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269418:518" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520375">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520375</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269418:518</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269418:518</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269418:518</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.35" accession="ERS501896" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501896</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635542</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.35</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.35:518</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>60638</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>518</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269419:540" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520376">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520376</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269419:540</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269419:540</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269419:540</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.65" accession="ERS501897" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501897</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635543</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.65</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.65:540</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82740</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>540</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269420:3" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520377">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520377</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269420:3</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269420:3</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269420:3</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.16" accession="ERS501898" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501898</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635544</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.16</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.16:3</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>101698</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>3</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269421:311" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520378">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520378</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269421:311</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269421:311</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269421:311</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.3" accession="ERS501899" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501899</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635545</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.3</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.3:311</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>115956</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>311</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269514:4" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520469">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520469</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269514:4</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269514:4</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269514:4</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.17" accession="ERS501992" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501992</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635638</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.17</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.17:4</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>59069</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269515:465" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520470">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520470</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269515:465</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269515:465</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269515:465</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.29" accession="ERS501993" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501993</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635639</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.29</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.29:465</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>113902</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>465</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269516:72" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520471">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520471</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269516:72</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269516:72</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269516:72</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.13" accession="ERS501994" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501994</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635640</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.13</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.13:72</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>55277</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>72</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269517:389" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520472">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520472</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269517:389</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269517:389</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269517:389</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.25" accession="ERS501995" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501995</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635641</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.25</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.25:389</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>96664</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>389</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269518:459" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520473">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520473</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269518:459</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269518:459</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269518:459</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.21" accession="ERS501996" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501996</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635642</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.21</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.21:459</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77367</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>459</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269519:382" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520474">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520474</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269519:382</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269519:382</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269519:382</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.18" accession="ERS501997" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501997</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635643</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.18</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.18:382</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70992</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>382</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269614:243" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520565">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520565</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269614:243</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269614:243</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269614:243</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.47" accession="ERS502092" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502092</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635738</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.47</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.47:243</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78937</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>243</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269615:416" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520566">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520566</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269615:416</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269615:416</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269615:416</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.60" accession="ERS502093" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502093</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635739</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.60</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.60:416</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82910</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>416</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269616:542" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520567">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520567</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269616:542</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269616:542</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269616:542</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.68" accession="ERS502094" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502094</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635740</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.68</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.68:542</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78460</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>542</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269617:25" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520568">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520568</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269617:25</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269617:25</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269617:25</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.44" accession="ERS502095" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502095</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635741</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.44</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.44:25</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64344</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>25</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269618:78" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520569">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520569</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269618:78</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269618:78</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269618:78</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.19" accession="ERS502096" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502096</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635742</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.19</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.19:78</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>62514</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>78</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269619:360" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520570">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520570</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269619:360</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269619:360</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269619:360</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.8" accession="ERS502097" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502097</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635743</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.8</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.8:360</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>87266</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>360</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269720:545" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520661">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520661</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269720:545</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269720:545</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269720:545</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.72" accession="ERS502198" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502198</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635844</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.72</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.72:545</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>86497</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>545</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269721:296" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520662">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520662</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269721:296</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269721:296</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269721:296</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.15" accession="ERS502199" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502199</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635845</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.15</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.15:296</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>85901</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>296</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269723:33" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520663">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520663</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269723:33</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269723:33</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269723:33</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.55" accession="ERS502201" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502201</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635847</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.55</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.55:33</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>94096</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>33</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269724:536" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520664">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520664</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269724:536</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269724:536</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269724:536</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.60" accession="ERS502202" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502202</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635848</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.60</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.60:536</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>68461</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>536</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269726:288" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520665">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520665</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269726:288</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269726:288</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269726:288</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.92" accession="ERS502204" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502204</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635850</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.92</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.92:288</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>81616</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>288</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269727:94" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520666">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520666</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269727:94</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269727:94</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269727:94</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.38" accession="ERS502205" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502205</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635851</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.38</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.38:94</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64568</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>94</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269784:28" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520197">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520197</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269784:28</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269784:28</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269784:28</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.49" accession="ERS501706" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501706</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635352</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.49</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.49:28</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>102391</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>28</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269785:395" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520198">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520198</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269785:395</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269785:395</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269785:395</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.31" accession="ERS501707" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501707</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635353</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.31</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.31:395</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77664</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>395</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269786:109" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520199">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520199</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269786:109</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269786:109</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269786:109</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.56" accession="ERS501708" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501708</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635354</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.56</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.56:109</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>86634</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>109</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269788:207" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520200">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520200</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269788:207</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269788:207</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269788:207</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.8" accession="ERS501710" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501710</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635356</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.8</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.8:207</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>192671</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>207</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269789:93" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520201">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520201</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269789:93</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269789:93</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269789:93</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.37" accession="ERS501711" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501711</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635357</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.37</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.37:93</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>79880</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>93</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269790:456" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520202">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520202</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269790:456</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269790:456</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269790:456</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.19" accession="ERS501712" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501712</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635358</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.19</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.19:456</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>128229</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>456</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269330:276" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520293">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520293</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269330:276</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269330:276</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269330:276</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.80" accession="ERS501808" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501808</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635454</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.80</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.80:276</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>79335</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>276</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269331:336" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520294">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520294</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269331:336</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269331:336</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269331:336</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.56" accession="ERS501809" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501809</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635455</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.56</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.56:336</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>60702</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>336</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269332:547" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520295">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520295</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269332:547</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269332:547</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269332:547</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.75" accession="ERS501810" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501810</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635456</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.75</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.75:547</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>99325</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>547</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269333:141" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520296">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520296</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269333:141</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269333:141</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269333:141</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.10" accession="ERS501811" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501811</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635457</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.10</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.10:141</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>19</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>141</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269334:268" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520297">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520297</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269334:268</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269334:268</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269334:268</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.72" accession="ERS501812" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501812</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635458</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.72</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.72:268</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>79951</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>268</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269335:249" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520298">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520298</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269335:249</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269335:249</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269335:249</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.53" accession="ERS501813" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501813</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635459</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.53</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.53:249</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>68203</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>249</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269423:398" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520379">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520379</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269423:398</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269423:398</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269423:398</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.35" accession="ERS501901" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501901</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635547</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.35</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.35:398</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>65587</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>398</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269424:254" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520380">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520380</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269424:254</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269424:254</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269424:254</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.58" accession="ERS501902" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501902</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635548</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.58</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.58:254</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69074</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>254</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269425:283" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520381">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520381</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269425:283</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269425:283</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269425:283</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.88" accession="ERS501903" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501903</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635549</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.88</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.88:283</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69541</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>283</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269426:339" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520382">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520382</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269426:339</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269426:339</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269426:339</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.6" accession="ERS501904" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501904</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635550</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.6</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.6:339</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82311</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>339</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269427:469" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520383">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520383</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269427:469</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269427:469</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269427:469</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.33" accession="ERS501905" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501905</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635551</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.33</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.33:469</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>81626</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>469</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269428:376" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520384">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520384</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269428:376</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269428:376</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269428:376</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.11" accession="ERS501906" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501906</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635552</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.11</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.11:376</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>102153</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>376</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269520:52" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520475">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520475</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269520:52</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269520:52</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269520:52</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.76" accession="ERS501998" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501998</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635644</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.76</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.76:52</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70516</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>52</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269521:214" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520476">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520476</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269521:214</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269521:214</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269521:214</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.15" accession="ERS501999" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501999</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635645</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.15</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.15:214</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>75017</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>214</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269522:0" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520477">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520477</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269522:0</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269522:0</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269522:0</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.13" accession="ERS502000" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502000</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635646</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.13</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.13:0</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>58257</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>0</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269523:448" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520478">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520478</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269523:448</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269523:448</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269523:448</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.1" accession="ERS502001" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502001</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635647</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.1</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.1:448</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>65863</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>448</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269524:27" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520479">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520479</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269524:27</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269524:27</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269524:27</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.48" accession="ERS502002" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502002</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635648</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.48</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.48:27</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69394</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>27</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269525:40" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520480">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520480</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269525:40</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269525:40</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269525:40</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.62" accession="ERS502003" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502003</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635649</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.62</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.62:40</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>72839</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>40</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269620:478" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520571">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520571</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269620:478</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269620:478</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269620:478</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.43" accession="ERS502098" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502098</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635744</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.43</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.43:478</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>43119</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>478</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269623:359" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520572">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520572</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269623:359</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269623:359</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269623:359</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.79" accession="ERS502101" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502101</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635747</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.79</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.79:359</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>84088</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>359</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269624:167" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520573">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520573</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269624:167</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269624:167</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269624:167</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.37" accession="ERS502102" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502102</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635748</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.37</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.37:167</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>2</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>167</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269625:20" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520574">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520574</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269625:20</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269625:20</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269625:20</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.39" accession="ERS502103" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502103</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635749</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.39</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.39:20</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82318</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>20</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269626:410" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520575">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520575</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269626:410</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269626:410</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269626:410</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.53" accession="ERS502104" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502104</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635750</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.53</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.53:410</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>68531</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>410</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269627:520" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520576">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520576</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269627:520</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269627:520</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269627:520</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.38" accession="ERS502105" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502105</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635751</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.38</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.38:520</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>66321</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>520</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269728:153" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520667">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520667</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269728:153</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269728:153</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269728:153</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.23" accession="ERS502206" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502206</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635852</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.23</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.23:153</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>153</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269729:74" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520668">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520668</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269729:74</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269729:74</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269729:74</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.15" accession="ERS502207" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502207</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635853</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.15</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.15:74</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74331</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>74</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269730:436" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520669">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520669</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269730:436</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269730:436</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269730:436</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.80" accession="ERS502208" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502208</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635854</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.80</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.80:436</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69422</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>436</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269731:114" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520670">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520670</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269731:114</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269731:114</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269731:114</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.61" accession="ERS502209" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502209</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635855</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.61</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.61:114</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64241</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>114</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269732:229" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520671">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520671</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269732:229</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269732:229</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269732:229</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.31" accession="ERS502210" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502210</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635856</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.31</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.31:229</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71959</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>229</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269733:63" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520672">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520672</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269733:63</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269733:63</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269733:63</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.92" accession="ERS502211" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502211</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635857</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.92</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.92:63</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>73660</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>63</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269791:516" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520203">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520203</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269791:516</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269791:516</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269791:516</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.33" accession="ERS501713" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501713</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635359</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.33</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.33:516</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>53011</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>516</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269792:64" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520204">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520204</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269792:64</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269792:64</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269792:64</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.93" accession="ERS501714" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501714</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635360</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.93</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.93:64</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>49285</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>64</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269793:265" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520205">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520205</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269793:265</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269793:265</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269793:265</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.7" accession="ERS501715" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501715</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635361</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.7</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.7:265</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83212</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>265</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269794:1" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520206">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520206</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269794:1</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269794:1</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269794:1</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.14" accession="ERS501716" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501716</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635362</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.14</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.14:1</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>97296</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269795:449" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520207">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520207</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269795:449</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269795:449</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269795:449</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.10" accession="ERS501717" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501717</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635363</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.10</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.10:449</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>145494</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>449</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269610:495" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520561">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520561</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269610:495</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269610:495</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269610:495</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.72" accession="ERS502088" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502088</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635734</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.72</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.72:495</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>133570</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>495</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269611:97" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520562">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520562</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269611:97</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269611:97</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269611:97</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.41" accession="ERS502089" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502089</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635735</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.41</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.41:97</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>73115</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>97</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269612:239" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520563">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520563</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269612:239</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269612:239</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269612:239</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.42" accession="ERS502090" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502090</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635736</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.42</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.42:239</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69086</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>239</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269613:215" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520564">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520564</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269613:215</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269613:215</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269613:215</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.16" accession="ERS502091" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502091</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635737</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.16</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.16:215</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>81663</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>215</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269714:188" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520655">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520655</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269714:188</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269714:188</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269714:188</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.58" accession="ERS502192" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502192</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635838</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.58</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.58:188</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>132056</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>188</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269715:521" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520656">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520656</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269715:521</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269715:521</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269715:521</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.40" accession="ERS502193" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502193</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635839</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.40</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.40:521</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>48855</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>521</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269716:300" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520657">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520657</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269716:300</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269716:300</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269716:300</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.19" accession="ERS502194" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502194</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635840</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.19</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.19:300</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>88670</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>300</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269717:312" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520658">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520658</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269717:312</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269717:312</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269717:312</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.30" accession="ERS502195" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502195</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635841</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.30</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.30:312</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>67520</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>312</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269796:470" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520208">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520208</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269796:470</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269796:470</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269796:470</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.34" accession="ERS501718" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501718</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635364</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.34</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.34:470</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>120480</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>470</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269337:104" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520299">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520299</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269337:104</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269337:104</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269337:104</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.51" accession="ERS501815" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501815</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635461</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.51</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.51:104</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>56180</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>104</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269338:515" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520300">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520300</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269338:515</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269338:515</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269338:515</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.32" accession="ERS501816" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501816</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635462</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.32</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.32:515</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>98939</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>515</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269339:123" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520301">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520301</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269339:123</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269339:123</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269339:123</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.75" accession="ERS501817" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501817</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635463</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.75</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.75:123</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>46198</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>123</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269340:335" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520302">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520302</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269340:335</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269340:335</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269340:335</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.55" accession="ERS501818" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501818</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635464</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.55</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.55:335</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>80465</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>335</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269341:184" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520303">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520303</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269341:184</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269341:184</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269341:184</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.54" accession="ERS501819" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501819</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635465</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.54</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.54:184</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>184</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269342:328" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520304">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520304</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269342:328</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269342:328</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269342:328</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.49" accession="ERS501820" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501820</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635466</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.49</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.49:328</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>11495</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>328</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269429:385" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520385">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520385</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269429:385</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269429:385</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269429:385</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.20" accession="ERS501907" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501907</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635553</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.20</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.20:385</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>75609</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>385</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269430:195" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520386">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520386</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269430:195</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269430:195</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269430:195</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.64" accession="ERS501908" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501908</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635554</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.64</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.64:195</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>200462</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>195</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269431:267" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520387">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520387</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269431:267</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269431:267</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269431:267</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.71" accession="ERS501909" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501909</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635555</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.71</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.71:267</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>84255</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>267</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269432:34" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520388">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520388</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269432:34</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269432:34</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269432:34</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.56" accession="ERS501910" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501910</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635556</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.56</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.56:34</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>89344</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>34</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269433:83" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520389">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520389</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269433:83</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269433:83</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269433:83</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.25" accession="ERS501911" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501911</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635557</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.25</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.25:83</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>63727</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>83</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269434:220" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520390">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520390</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269434:220</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269434:220</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269434:220</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.20" accession="ERS501912" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501912</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635558</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.20</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.20:220</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69870</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>220</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269526:139" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520481">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520481</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269526:139</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269526:139</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269526:139</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.96" accession="ERS502004" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502004</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635650</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.96</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.96:139</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>52284</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>139</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269527:345" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520482">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520482</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269527:345</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269527:345</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269527:345</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.66" accession="ERS502005" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502005</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635651</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.66</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.66:345</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>92622</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>345</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269528:90" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520483">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520483</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269528:90</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269528:90</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269528:90</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.34" accession="ERS502006" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502006</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635652</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.34</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.34:90</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64438</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>90</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269530:427" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520484">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520484</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269530:427</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269530:427</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269530:427</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.72" accession="ERS502008" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502008</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635654</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.72</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.72:427</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>103002</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>427</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269531:73" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520485">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520485</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269531:73</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269531:73</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269531:73</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.14" accession="ERS502009" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502009</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635655</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.14</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.14:73</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>67054</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>73</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269532:375" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520486">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520486</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269532:375</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269532:375</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269532:375</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.10" accession="ERS502010" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502010</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635656</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.10</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.10:375</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>92180</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>375</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269628:421" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520577">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520577</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269628:421</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269628:421</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269628:421</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.66" accession="ERS502106" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502106</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635752</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.66</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.66:421</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>108996</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>421</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269629:105" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520578">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520578</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269629:105</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269629:105</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269629:105</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.52" accession="ERS502107" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502107</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635753</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.52</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.52:105</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>62549</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>105</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269630:154" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520579">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520579</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269630:154</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269630:154</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269630:154</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.24" accession="ERS502108" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502108</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635754</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.24</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.24:154</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>154</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269631:71" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520580">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520580</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269631:71</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269631:71</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269631:71</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.12" accession="ERS502109" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502109</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635755</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.12</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.12:71</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71126</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>71</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269632:378" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520581">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520581</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269632:378</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269632:378</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269632:378</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.13" accession="ERS502110" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502110</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635756</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.13</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.13:378</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>84061</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>378</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269633:320" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520582">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520582</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269633:320</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269633:320</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269633:320</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.4" accession="ERS502111" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502111</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635757</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.4</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.4:320</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>68818</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>320</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269735:39" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520673">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520673</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269735:39</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269735:39</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269735:39</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.61" accession="ERS502213" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502213</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635859</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.61</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.61:39</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>44442</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>39</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269736:21" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520674">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520674</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269736:21</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269736:21</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269736:21</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.4" accession="ERS502214" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502214</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635860</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.4</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.4:21</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64773</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>21</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269737:136" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520675">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520675</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269737:136</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269737:136</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269737:136</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.93" accession="ERS502215" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502215</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635861</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.93</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.93:136</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>30479</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>136</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269738:400" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520676">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520676</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269738:400</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269738:400</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269738:400</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.38" accession="ERS502216" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502216</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635862</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.38</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.38:400</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>63141</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>400</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269739:387" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520677">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520677</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269739:387</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269739:387</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269739:387</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.23" accession="ERS502217" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502217</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635863</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.23</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.23:387</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70084</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>387</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269740:415" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520678">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520678</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269740:415</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269740:415</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269740:415</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.6" accession="ERS502218" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502218</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635864</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.6</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.6:415</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77820</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>415</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269797:362" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520209">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520209</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269797:362</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269797:362</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269797:362</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.81" accession="ERS501719" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501719</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635365</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.81</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.81:362</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>73326</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>362</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269798:452" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520210">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520210</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269798:452</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269798:452</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269798:452</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.15" accession="ERS501720" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501720</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635366</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.15</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.15:452</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>86078</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>452</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269800:230" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520211">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520211</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269800:230</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269800:230</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269800:230</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.32" accession="ERS501722" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501722</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635368</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.32</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.32:230</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>76613</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>230</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269801:429" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520212">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520212</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269801:429</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269801:429</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269801:429</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.74" accession="ERS501723" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501723</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635369</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.74</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.74:429</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>111822</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>429</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269802:101" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520213">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520213</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269802:101</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269802:101</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269802:101</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.48" accession="ERS501724" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501724</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635370</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.48</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.48:101</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78232</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>101</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269803:476" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520214">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520214</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269803:476</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269803:476</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269803:476</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.41" accession="ERS501725" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501725</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635371</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.41</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.41:476</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>94483</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>476</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269343:396" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520305">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520305</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269343:396</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269343:396</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269343:396</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.33" accession="ERS501821" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501821</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635467</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.33</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.33:396</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>89364</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>396</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269344:485" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520306">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520306</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269344:485</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269344:485</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269344:485</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.50" accession="ERS501822" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501822</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635468</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.50</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.50:485</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>269979</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>485</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269345:132" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520307">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520307</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269345:132</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269345:132</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269345:132</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.88" accession="ERS501823" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501823</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635469</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.88</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.88:132</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>28535</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>132</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269346:113" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520308">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520308</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269346:113</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269346:113</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269346:113</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.60" accession="ERS501824" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501824</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635470</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.60</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.60:113</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>57507</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>113</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269348:77" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520309">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520309</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269348:77</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269348:77</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269348:77</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.18" accession="ERS501826" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501826</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635472</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.18</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.18:77</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70788</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>77</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269349:402" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520310">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520310</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269349:402</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269349:402</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269349:402</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.4" accession="ERS501827" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501827</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635473</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.4</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.4:402</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>97023</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>402</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269435:213" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520391">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520391</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269435:213</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269435:213</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269435:213</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.14" accession="ERS501913" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501913</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635559</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.14</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.14:213</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>89099</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>213</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269436:405" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520392">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520392</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269436:405</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269436:405</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269436:405</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.45" accession="ERS501914" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501914</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635560</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.45</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.45:405</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82652</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>405</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269437:308" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520393">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520393</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269437:308</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269437:308</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269437:308</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.27" accession="ERS501915" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501915</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635561</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.27</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.27:308</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>55224</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>308</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269438:122" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520394">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520394</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269438:122</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269438:122</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269438:122</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.74" accession="ERS501916" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501916</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635562</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.74</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.74:122</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>67177</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>122</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269439:65" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520395">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520395</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269439:65</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269439:65</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269439:65</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.94" accession="ERS501917" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501917</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635563</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.94</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.94:65</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>68633</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>65</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269440:19" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520396">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520396</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269440:19</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269440:19</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269440:19</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.37" accession="ERS501918" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501918</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635564</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.37</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.37:19</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>67224</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>19</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269533:523" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520487">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520487</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269533:523</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269533:523</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269533:523</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.44" accession="ERS502011" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502011</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635657</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.44</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.44:523</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>58815</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>523</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269534:422" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520488">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520488</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269534:422</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269534:422</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269534:422</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.67" accession="ERS502012" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502012</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635658</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.67</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.67:422</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>92382</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>422</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269535:299" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520489">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520489</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269535:299</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269535:299</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269535:299</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.18" accession="ERS502013" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502013</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635659</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.18</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.18:299</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>76486</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>299</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269536:278" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520490">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520490</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269536:278</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269536:278</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269536:278</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.82" accession="ERS502014" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502014</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635660</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.82</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.82:278</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64013</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>278</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269537:261" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520491">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520491</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269537:261</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269537:261</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269537:261</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.66" accession="ERS502015" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502015</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635661</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.66</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.66:261</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>76137</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>261</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269538:447" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520492">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520492</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269538:447</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269538:447</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269538:447</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.93" accession="ERS502016" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502016</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635662</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.93</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.93:447</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>87320</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>447</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269634:41" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520583">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520583</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269634:41</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269634:41</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269634:41</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.63" accession="ERS502112" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502112</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635758</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.63</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.63:41</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>98083</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>41</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269635:51" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520584">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520584</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269635:51</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269635:51</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269635:51</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.75" accession="ERS502113" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502113</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635759</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.75</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.75:51</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>66078</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>51</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269636:407" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520585">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520585</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269636:407</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269636:407</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269636:407</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.50" accession="ERS502114" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502114</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635760</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.50</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.50:407</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>93836</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>407</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269637:272" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520586">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520586</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269637:272</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269637:272</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269637:272</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.77" accession="ERS502115" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502115</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635761</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.77</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.77:272</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>94805</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>272</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269638:391" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520587">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520587</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269638:391</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269638:391</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269638:391</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.28" accession="ERS502116" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502116</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635762</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.28</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.28:391</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>88725</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>391</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269639:211" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520588">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520588</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269639:211</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269639:211</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269639:211</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.11" accession="ERS502117" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502117</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635763</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.11</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.11:211</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>80633</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>211</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269741:106" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520679">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520679</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269741:106</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269741:106</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269741:106</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.53" accession="ERS502219" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502219</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635865</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.53</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.53:106</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>58852</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>106</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269743:251" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520680">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520680</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269743:251</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269743:251</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269743:251</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.55" accession="ERS502221" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502221</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635867</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.55</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.55:251</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>93127</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>251</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269744:404" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520681">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520681</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269744:404</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269744:404</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269744:404</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.42" accession="ERS502222" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502222</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635868</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.42</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.42:404</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83320</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>404</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269745:257" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520682">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520682</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269745:257</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269745:257</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269745:257</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.62" accession="ERS502223" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502223</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635869</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.62</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.62:257</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>73353</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>257</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269746:440" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520683">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520683</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269746:440</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269746:440</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269746:440</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.86" accession="ERS502224" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502224</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635870</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.86</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.86:440</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>99279</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>440</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269747:8" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520684">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520684</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269747:8</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269747:8</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269747:8</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.20" accession="ERS502225" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502225</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635871</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.20</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.20:8</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>73287</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>8</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269804:546" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520215">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520215</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269804:546</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269804:546</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269804:546</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.73" accession="ERS501726" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501726</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635372</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.73</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.73:546</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>55545</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>546</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269805:219" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520216">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520216</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269805:219</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269805:219</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269805:219</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.2" accession="ERS501727" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501727</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635373</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.2</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.2:219</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>95386</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>219</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269806:152" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520217">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520217</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269806:152</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269806:152</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269806:152</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.22" accession="ERS501728" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501728</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635374</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.22</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.22:152</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>152</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269807:37" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520218">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520218</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269807:37</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269807:37</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269807:37</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.6" accession="ERS501729" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501729</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635375</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.6</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.6:37</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>45439</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>37</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269808:355" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520219">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520219</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269808:355</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269808:355</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269808:355</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.75" accession="ERS501730" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501730</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635376</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.75</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.75:355</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>103040</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>355</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269809:99" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520220">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520220</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269809:99</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269809:99</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269809:99</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.44" accession="ERS501731" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501731</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635377</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.44</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.44:99</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77088</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>99</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269350:61" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520311">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520311</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269350:61</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269350:61</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269350:61</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.89" accession="ERS501828" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501828</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635474</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.89</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.89:61</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>66470</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>61</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269351:555" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520312">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520312</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269351:555</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269351:555</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269351:555</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.96" accession="ERS501829" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501829</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635475</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.96</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.96:555</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>88700</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>555</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269352:369" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520313">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520313</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269352:369</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269352:369</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269352:369</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.89" accession="ERS501830" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501830</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635476</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.89</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.89:369</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>90441</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>369</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269353:10" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520314">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520314</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269353:10</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269353:10</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269353:10</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.24" accession="ERS501831" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501831</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635477</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.24</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.24:10</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>101929</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>10</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269354:473" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520315">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520315</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269354:473</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269354:473</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269354:473</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.39" accession="ERS501832" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501832</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635478</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.39</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.39:473</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82162</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>473</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269355:432" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520316">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520316</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269355:432</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269355:432</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269355:432</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.77" accession="ERS501833" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501833</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635479</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.77</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.77:432</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>102971</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>432</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269441:468" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520397">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520397</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269441:468</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269441:468</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269441:468</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.32" accession="ERS501919" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501919</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635565</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.32</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.32:468</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>91151</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>468</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269442:42" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520398">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520398</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269442:42</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269442:42</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269442:42</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.64" accession="ERS501920" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501920</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635566</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.64</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.64:42</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78328</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>42</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269443:428" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520399">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520399</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269443:428</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269443:428</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269443:428</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.73" accession="ERS501921" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501921</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635567</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.73</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.73:428</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>114254</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>428</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269444:171" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520400">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520400</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269444:171</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269444:171</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269444:171</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.41" accession="ERS501922" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501922</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635568</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.41</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.41:171</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>3</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>171</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269445:326" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520401">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520401</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269445:326</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269445:326</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269445:326</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.47" accession="ERS501923" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501923</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635569</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.47</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.47:326</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>79340</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>326</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269446:124" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520402">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520402</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269446:124</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269446:124</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269446:124</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.77" accession="ERS501924" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501924</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635570</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.77</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.77:124</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>67258</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>124</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269539:178" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520493">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520493</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269539:178</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269539:178</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269539:178</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.49" accession="ERS502017" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502017</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635663</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.49</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.49:178</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>5</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>178</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269540:55" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520494">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520494</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269540:55</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269540:55</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269540:55</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.79" accession="ERS502018" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502018</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635664</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.79</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.79:55</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>52298</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>55</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269541:148" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520495">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520495</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269541:148</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269541:148</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269541:148</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.18" accession="ERS502019" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502019</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635665</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.18</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.18:148</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>2</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>148</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269542:424" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520496">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520496</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269542:424</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269542:424</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269542:424</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.7" accession="ERS502020" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502020</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635666</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.7</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.7:424</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>98311</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>424</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269543:262" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520497">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520497</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269543:262</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269543:262</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269543:262</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.67" accession="ERS502021" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502021</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635667</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.67</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.67:262</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>68825</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>262</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269544:223" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520498">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520498</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269544:223</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269544:223</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269544:223</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.25" accession="ERS502022" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502022</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635668</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.25</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.25:223</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>93167</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>223</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269640:524" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520589">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520589</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269640:524</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269640:524</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269640:524</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.45" accession="ERS502118" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502118</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635764</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.45</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.45:524</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>73612</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>524</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269641:24" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520590">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520590</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269641:24</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269641:24</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269641:24</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.43" accession="ERS502119" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502119</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635765</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.43</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.43:24</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83966</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>24</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269642:46" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520591">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520591</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269642:46</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269642:46</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269642:46</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.7" accession="ERS502120" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502120</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635766</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.7</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.7:46</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>72280</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>46</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269643:35" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520592">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520592</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269643:35</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269643:35</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269643:35</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.58" accession="ERS502121" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502121</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635767</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.58</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.58:35</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70728</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>35</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269645:484" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520593">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520593</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269645:484</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269645:484</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269645:484</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.5" accession="ERS502123" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502123</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635769</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.5</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.5:484</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83817</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>484</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269646:460" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520594">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520594</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269646:460</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269646:460</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269646:460</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.24" accession="ERS502124" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502124</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635770</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.24</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.24:460</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71107</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>460</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269748:423" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520685">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520685</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269748:423</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269748:423</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269748:423</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.69" accession="ERS502226" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502226</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635872</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.69</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.69:423</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>96698</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>423</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269749:198" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520686">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520686</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269749:198</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269749:198</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269749:198</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.67" accession="ERS502227" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502227</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635873</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.67</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.67:198</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>163716</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>198</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269750:519" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520687">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520687</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269750:519</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269750:519</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269750:519</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.37" accession="ERS502228" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502228</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635874</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.37</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.37:519</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>59491</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>519</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269751:451" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520688">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520688</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269751:451</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269751:451</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269751:451</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.14" accession="ERS502229" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502229</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635875</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.14</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.14:451</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74544</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>451</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269752:216" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520689">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520689</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269752:216</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269752:216</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269752:216</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.17" accession="ERS502230" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502230</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635876</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.17</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.17:216</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>79367</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>216</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269753:343" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520690">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520690</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269753:343</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269753:343</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269753:343</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.64" accession="ERS502231" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502231</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635877</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.64</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.64:343</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69955</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>343</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269810:526" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520221">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520221</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269810:526</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269810:526</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269810:526</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.49" accession="ERS501732" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501732</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635378</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.49</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.49:526</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>48472</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>526</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269811:247" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520222">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520222</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269811:247</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269811:247</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269811:247</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.51" accession="ERS501733" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501733</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635379</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.51</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.51:247</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77431</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>247</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269813:337" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520223">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520223</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269813:337</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269813:337</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269813:337</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.57" accession="ERS501735" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501735</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635381</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.57</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.57:337</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78760</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>337</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269814:446" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520224">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520224</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269814:446</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269814:446</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269814:446</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.92" accession="ERS501736" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501736</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635382</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.92</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.92:446</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>105803</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>446</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269815:186" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520225">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520225</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269815:186</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269815:186</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269815:186</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.56" accession="ERS501737" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501737</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635383</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.56</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.56:186</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>3</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>186</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269816:232" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520226">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520226</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269816:232</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269816:232</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269816:232</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.34" accession="ERS501738" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501738</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635384</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.34</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.34:232</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74602</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>232</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269356:505" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520317">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520317</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269356:505</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269356:505</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269356:505</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.2" accession="ERS501834" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501834</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635480</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.2</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.2:505</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>104860</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>505</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269357:80" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520318">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520318</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269357:80</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269357:80</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269357:80</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.20" accession="ERS501835" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501835</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635481</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.20</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.20:80</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>59687</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>80</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269358:503" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520319">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520319</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269358:503</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269358:503</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269358:503</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.1" accession="ERS501836" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501836</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635482</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.1</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.1:503</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>102213</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>503</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269359:86" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520320">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520320</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269359:86</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269359:86</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269359:86</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.29" accession="ERS501837" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501837</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635483</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.29</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.29:86</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82102</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>86</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269360:128" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520321">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520321</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269360:128</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269360:128</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269360:128</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.81" accession="ERS501838" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501838</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635484</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.81</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.81:128</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>58700</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>128</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269361:371" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520322">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520322</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269361:371</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269361:371</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269361:371</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.90" accession="ERS501839" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501839</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635485</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.90</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.90:371</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>87371</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>371</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269447:274" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520403">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520403</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269447:274</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269447:274</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269447:274</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.79" accession="ERS501925" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501925</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635571</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.79</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.79:274</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74888</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>274</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269448:342" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520404">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520404</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269448:342</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269448:342</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269448:342</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.62" accession="ERS501926" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501926</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635572</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.62</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.62:342</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>65998</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>342</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269449:514" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520405">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520405</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269449:514</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269449:514</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269449:514</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.30" accession="ERS501927" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501927</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635573</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.30</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.30:514</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>90540</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>514</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269450:163" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520406">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520406</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269450:163</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269450:163</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269450:163</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.32" accession="ERS501928" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501928</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635574</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.32</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.32:163</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>2</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>163</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269451:455" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520407">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520407</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269451:455</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269451:455</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269451:455</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.18" accession="ERS501929" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501929</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635575</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.18</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.18:455</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>109326</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>455</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269452:532" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520408">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520408</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269452:532</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269452:532</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269452:532</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.57" accession="ERS501930" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501930</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635576</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.57</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.57:532</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>52225</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>532</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269545:527" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520499">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520499</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269545:527</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269545:527</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269545:527</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.5" accession="ERS502023" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502023</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635669</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.5</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.5:527</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>102363</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>527</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269546:307" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520500">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520500</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269546:307</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269546:307</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269546:307</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.25" accession="ERS502024" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502024</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635670</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.25</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.25:307</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>81843</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>307</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269547:504" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520501">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520501</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269547:504</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269547:504</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269547:504</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.15" accession="ERS502025" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502025</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635671</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.15</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.15:504</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>93587</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>504</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269548:81" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520502">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520502</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269548:81</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269548:81</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269548:81</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.21" accession="ERS502026" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502026</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635672</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.21</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.21:81</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>31883</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>81</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269549:102" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520503">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520503</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269549:102</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269549:102</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269549:102</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.49" accession="ERS502027" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502027</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635673</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.49</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.49:102</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>61478</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>102</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269550:554" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520504">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520504</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269550:554</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269550:554</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269550:554</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.91" accession="ERS502028" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502028</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635674</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.91</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.91:554</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69821</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>554</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269647:30" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520595">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520595</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269647:30</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269647:30</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269647:30</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.51" accession="ERS502125" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502125</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635771</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.51</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.51:30</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>86346</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>30</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269648:380" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520596">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520596</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269648:380</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269648:380</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269648:380</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.15" accession="ERS502126" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502126</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635772</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.15</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.15:380</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83489</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>380</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269649:218" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520597">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520597</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269649:218</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269649:218</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269649:218</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.19" accession="ERS502127" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502127</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635773</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.19</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.19:218</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77545</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>218</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269650:50" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520598">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520598</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269650:50</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269650:50</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269650:50</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.74" accession="ERS502128" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502128</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635774</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.74</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.74:50</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70888</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>50</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269651:490" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520599">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520599</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269651:490</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269651:490</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269651:490</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.59" accession="ERS502129" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502129</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635775</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.59</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.59:490</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>76614</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>490</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269652:137" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520600">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520600</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269652:137</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269652:137</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269652:137</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.94" accession="ERS502130" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502130</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635776</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.94</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.94:137</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>44699</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>137</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269755:347" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520691">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520691</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269755:347</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269755:347</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269755:347</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.68" accession="ERS502233" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502233</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635879</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.68</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.68:347</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>59534</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>347</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269756:133" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520692">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520692</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269756:133</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269756:133</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269756:133</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.89" accession="ERS502234" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502234</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635880</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.89</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.89:133</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64056</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>133</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269757:303" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520693">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520693</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269757:303</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269757:303</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269757:303</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.21" accession="ERS502235" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502235</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635881</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.21</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.21:303</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71711</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>303</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269758:364" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520694">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520694</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269758:364</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269758:364</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269758:364</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.83" accession="ERS502236" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502236</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635882</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.83</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.83:364</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>86114</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>364</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269759:15" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520695">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520695</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269759:15</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269759:15</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269759:15</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.31" accession="ERS502237" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502237</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635883</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.31</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.31:15</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>73414</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>15</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269817:269" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520227">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520227</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269817:269</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269817:269</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269817:269</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.74" accession="ERS501739" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501739</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635385</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.74</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.74:269</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>88282</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>269</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269818:480" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520228">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520228</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269818:480</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269818:480</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269818:480</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.45" accession="ERS501740" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501740</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635386</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.45</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.45:480</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>113616</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>480</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269819:187" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520229">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520229</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269819:187</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269819:187</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269819:187</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.57" accession="ERS501741" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501741</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635387</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.57</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.57:187</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>187</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269820:353" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520230">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520230</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269820:353</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269820:353</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269820:353</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.73" accession="ERS501742" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501742</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635388</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.73</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.73:353</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>97882</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>353</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269821:403" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520231">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520231</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269821:403</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269821:403</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269821:403</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.41" accession="ERS501743" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501743</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635389</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.41</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.41:403</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78640</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>403</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269822:36" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520232">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520232</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269822:36</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269822:36</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269822:36</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.59" accession="ERS501744" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501744</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635390</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.59</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.59:36</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>65942</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>36</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269362:143" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520323">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520323</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269362:143</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269362:143</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269362:143</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.12" accession="ERS501840" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501840</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635486</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.12</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.12:143</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>143</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269363:248" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520324">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520324</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269363:248</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269363:248</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269363:248</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.52" accession="ERS501841" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501841</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635487</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.52</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.52:248</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>90362</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>248</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269364:227" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520325">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520325</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269364:227</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269364:227</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269364:227</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.3" accession="ERS501842" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501842</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635488</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.3</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.3:227</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>94482</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>227</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269365:341" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520326">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520326</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269365:341</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269365:341</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269365:341</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.61" accession="ERS501843" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501843</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635489</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.61</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.61:341</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64268</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>341</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269366:386" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520327">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520327</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269366:386</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269366:386</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269366:386</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.21" accession="ERS501844" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501844</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635490</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.21</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.21:386</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>79090</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>386</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269367:356" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520328">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520328</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269367:356</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269367:356</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269367:356</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.76" accession="ERS501845" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501845</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635491</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.76</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.76:356</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74458</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>356</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269453:68" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520409">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520409</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269453:68</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269453:68</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269453:68</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.1" accession="ERS501931" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501931</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635577</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.1</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.1:68</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>65544</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>68</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269454:392" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520410">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520410</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269454:392</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269454:392</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269454:392</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.29" accession="ERS501932" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501932</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635578</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.29</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.29:392</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83053</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>392</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269455:346" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520411">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520411</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269455:346</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269455:346</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269455:346</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.67" accession="ERS501933" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501933</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635579</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.67</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.67:346</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>63565</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>346</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269457:496" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520412">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520412</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269457:496</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269457:496</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269457:496</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.75" accession="ERS501935" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501935</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635581</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.75</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.75:496</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>85675</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>496</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269458:361" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520413">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520413</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269458:361</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269458:361</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269458:361</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.80" accession="ERS501936" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501936</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635582</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.80</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.80:361</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77739</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>361</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269459:49" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520414">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520414</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269459:49</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269459:49</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269459:49</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.73" accession="ERS501937" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501937</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635583</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.73</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.73:49</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>85733</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>49</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269551:333" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520505">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520505</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269551:333</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269551:333</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269551:333</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.53" accession="ERS502029" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502029</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635675</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.53</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.53:333</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>62619</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>333</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269552:54" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520506">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520506</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269552:54</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269552:54</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269552:54</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.78" accession="ERS502030" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502030</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635676</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.78</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.78:54</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>40361</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>54</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269553:110" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520507">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520507</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269553:110</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269553:110</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269553:110</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.57" accession="ERS502031" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502031</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635677</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.57</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.57:110</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>58256</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>110</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269554:513" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520508">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520508</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269554:513</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269554:513</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269554:513</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.3" accession="ERS502032" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502032</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635678</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.3</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.3:513</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74001</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>513</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269555:541" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520509">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520509</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269555:541</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269555:541</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269555:541</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.66" accession="ERS502033" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502033</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635679</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.66</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.66:541</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>102191</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>541</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269556:134" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520510">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520510</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269556:134</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269556:134</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269556:134</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.9" accession="ERS502034" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502034</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635680</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.9</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.9:134</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>63360</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>134</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269654:366" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520601">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520601</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269654:366</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269654:366</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269654:366</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.86" accession="ERS502132" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502132</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635778</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.86</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.86:366</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>67063</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>366</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269655:316" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520602">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520602</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269655:316</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269655:316</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269655:316</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.35" accession="ERS502133" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502133</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635779</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.35</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.35:316</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74599</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>316</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269656:477" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520603">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520603</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269656:477</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269656:477</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269656:477</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.42" accession="ERS502134" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502134</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635780</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.42</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.42:477</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>92392</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>477</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269657:91" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520604">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520604</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269657:91</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269657:91</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269657:91</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.35" accession="ERS502135" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502135</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635781</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.35</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.35:91</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64476</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>91</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269658:463" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520605">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520605</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269658:463</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269658:463</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269658:463</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.27" accession="ERS502136" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502136</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635782</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.27</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.27:463</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>93708</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>463</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269659:234" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520606">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520606</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269659:234</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269659:234</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269659:234</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.36" accession="ERS502137" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502137</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635783</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.36</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.36:234</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>90672</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>234</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269823:241" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520233">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520233</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269823:241</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269823:241</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269823:241</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.44" accession="ERS501745" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501745</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635391</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.44</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.44:241</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>68654</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>241</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269824:510" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520234">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520234</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269824:510</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269824:510</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269824:510</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.26" accession="ERS501746" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501746</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635392</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.26</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.26:510</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>101814</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>510</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269825:445" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520235">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520235</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269825:445</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269825:445</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269825:445</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.91" accession="ERS501747" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501747</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635393</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.91</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.91:445</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>98084</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>445</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269826:252" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520236">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520236</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269826:252</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269826:252</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269826:252</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.56" accession="ERS501748" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501748</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635394</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.56</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.56:252</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>76730</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>252</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269827:550" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520237">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520237</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269827:550</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269827:550</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269827:550</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.81" accession="ERS501749" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501749</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635395</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.81</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.81:550</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>66823</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>550</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269828:322" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520238">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520238</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269828:322</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269828:322</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269828:322</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.41" accession="ERS501750" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501750</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635396</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.41</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.41:322</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>72123</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>322</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269369:277" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520330">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520330</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269369:277</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269369:277</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269369:277</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.81" accession="ERS501847" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501847</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635493</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.81</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.81:277</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69248</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>277</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269370:461" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520331">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520331</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269370:461</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269370:461</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269370:461</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.25" accession="ERS501848" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501848</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635494</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.25</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.25:461</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>138797</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>461</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269368:17" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520329">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520329</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269368:17</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269368:17</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269368:17</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.34" accession="ERS501846" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501846</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635492</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.34</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.34:17</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>46133</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>17</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269372:244" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520332">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520332</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269372:244</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269372:244</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269372:244</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.48" accession="ERS501850" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501850</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635496</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.48</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.48:244</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82485</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>244</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269373:321" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520333">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520333</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269373:321</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269373:321</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269373:321</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.40" accession="ERS501851" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501851</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635497</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.40</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.40:321</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>68562</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>321</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269374:350" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520334">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520334</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269374:350</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269374:350</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269374:350</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.70" accession="ERS501852" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501852</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635498</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.70</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.70:350</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>87811</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>350</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269461:53" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520416">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520416</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269461:53</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269461:53</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269461:53</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.77" accession="ERS501939" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501939</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635585</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.77</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.77:53</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69074</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>53</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269462:56" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520417">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520417</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269462:56</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269462:56</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269462:56</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.8" accession="ERS501940" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501940</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635586</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.8</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.8:56</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>62598</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>56</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269460:5" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520415">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520415</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269460:5</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269460:5</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269460:5</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.18" accession="ERS501938" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501938</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635584</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.18</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.18:5</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>48779</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>5</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269463:76" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520418">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520418</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269463:76</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269463:76</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269463:76</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.17" accession="ERS501941" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501941</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635587</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.17</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.17:76</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71081</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>76</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269464:111" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520419">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520419</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269464:111</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269464:111</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269464:111</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.59" accession="ERS501942" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501942</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635588</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.59</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.59:111</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64175</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>111</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269465:370" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520420">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520420</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269465:370</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269465:370</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269465:370</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.9" accession="ERS501943" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501943</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635589</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.9</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.9:370</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>93194</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>370</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269557:304" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520511">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520511</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269557:304</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269557:304</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269557:304</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.22" accession="ERS502035" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502035</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635681</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.22</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.22:304</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>45051</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>304</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269558:121" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520512">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520512</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269558:121</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269558:121</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269558:121</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.73" accession="ERS502036" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502036</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635682</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.73</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.73:121</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64198</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>121</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269561:528" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520514">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520514</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269561:528</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269561:528</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269561:528</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.50" accession="ERS502039" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502039</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635685</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.50</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.50:528</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>72289</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>528</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269562:292" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520515">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520515</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269562:292</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269562:292</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269562:292</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.10" accession="ERS502040" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502040</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635686</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.10</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.10:292</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78780</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>292</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269560:237" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520513">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520513</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269560:237</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269560:237</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269560:237</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.4" accession="ERS502038" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502038</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635684</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.4</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.4:237</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>92517</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>237</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269563:327" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520516">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520516</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269563:327</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269563:327</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269563:327</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.48" accession="ERS502041" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502041</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635687</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.48</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.48:327</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>63884</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>327</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269660:284" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520607">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520607</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269660:284</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269660:284</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269660:284</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.89" accession="ERS502138" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502138</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635784</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.89</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.89:284</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>65815</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>284</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269661:108" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520608">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520608</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269661:108</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269661:108</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269661:108</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.55" accession="ERS502139" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502139</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635785</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.55</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.55:108</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>58383</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>108</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269662:344" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520609">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520609</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269662:344</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269662:344</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269662:344</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.65" accession="ERS502140" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502140</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635786</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.65</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.65:344</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>75637</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>344</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269663:442" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520610">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520610</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269663:442</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269663:442</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269663:442</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.88" accession="ERS502141" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502141</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635787</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.88</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.88:442</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77077</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>442</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269665:552" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520611">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520611</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269665:552</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269665:552</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269665:552</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.87" accession="ERS502143" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502143</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635789</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.87</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.87:552</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>59179</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>552</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269666:544" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520612">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520612</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269666:544</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269666:544</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269666:544</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.71" accession="ERS502144" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502144</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635790</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.71</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.71:544</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>75440</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>544</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269829:131" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520239">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520239</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269829:131</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269829:131</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269829:131</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.87" accession="ERS501751" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501751</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635397</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.87</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.87:131</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>42843</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>131</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269830:489" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520240">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520240</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269830:489</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269830:489</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269830:489</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.54" accession="ERS501752" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501752</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635398</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.54</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.54:489</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>175332</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>489</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269831:499" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520241">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520241</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269831:499</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269831:499</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269831:499</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.84" accession="ERS501753" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501753</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635399</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.84</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.84:499</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>153742</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>499</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269832:409" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520242">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520242</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269832:409</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269832:409</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269832:409</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.52" accession="ERS501754" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501754</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635400</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.52</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.52:409</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83445</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>409</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269833:270" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520243">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520243</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269833:270</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269833:270</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269833:270</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.75" accession="ERS501755" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501755</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635401</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.75</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.75:270</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>86085</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>270</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269834:225" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520244">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520244</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269834:225</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269834:225</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269834:225</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.28" accession="ERS501756" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501756</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635402</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.28</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.28:225</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83671</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>225</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269375:273" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520335">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520335</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269375:273</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269375:273</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269375:273</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.78" accession="ERS501853" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501853</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635499</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.78</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.78:273</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70465</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>273</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269376:458" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520336">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520336</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269376:458</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269376:458</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269376:458</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.20" accession="ERS501854" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501854</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635500</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.20</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.20:458</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>80517</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>458</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269377:549" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520337">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520337</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269377:549</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269377:549</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269377:549</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.79" accession="ERS501855" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501855</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635501</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.79</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.79:549</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>88506</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>549</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269378:508" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520338">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520338</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269378:508</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269378:508</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269378:508</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.24" accession="ERS501856" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501856</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635502</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.24</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.24:508</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>89780</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>508</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269379:250" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520339">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520339</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269379:250</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269379:250</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269379:250</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.54" accession="ERS501857" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501857</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635503</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.54</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.54:250</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>81661</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>250</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269381:182" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520340">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520340</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269381:182</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269381:182</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269381:182</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.52" accession="ERS501859" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501859</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635505</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.52</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.52:182</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>182</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269466:228" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520421">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520421</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269466:228</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269466:228</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269466:228</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.30" accession="ERS501944" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501944</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635590</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.30</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.30:228</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69756</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>228</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269467:454" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520422">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520422</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269467:454</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269467:454</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269467:454</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.17" accession="ERS501945" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501945</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635591</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.17</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.17:454</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>129649</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>454</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269469:433" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520424">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520424</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269469:433</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269469:433</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269469:433</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.78" accession="ERS501947" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501947</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635593</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.78</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.78:433</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>97269</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>433</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269470:330" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520425">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520425</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269470:330</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269470:330</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269470:330</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.50" accession="ERS501948" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501948</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635594</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.50</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.50:330</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>84794</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>330</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269468:388" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520423">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520423</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269468:388</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269468:388</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269468:388</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.24" accession="ERS501946" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501946</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635592</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.24</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.24:388</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>81732</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>388</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269471:411" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520426">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520426</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269471:411</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269471:411</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269471:411</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.54" accession="ERS501949" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501949</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635595</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.54</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.54:411</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78376</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>411</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269564:231" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520517">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520517</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269564:231</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269564:231</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269564:231</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.33" accession="ERS502042" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502042</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635688</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.33</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.33:231</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>92291</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>231</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269565:48" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520518">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520518</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269565:48</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269565:48</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269565:48</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.72" accession="ERS502043" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502043</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635689</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.72</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.72:48</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82990</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>48</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269566:130" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520519">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520519</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269566:130</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269566:130</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269566:130</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.84" accession="ERS502044" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502044</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635690</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.84</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.84:130</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>58390</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>130</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269567:193" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520520">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520520</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269567:193</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269567:193</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269567:193</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.62" accession="ERS502045" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502045</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635691</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.62</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.62:193</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>3</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>193</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269568:466" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520521">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520521</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269568:466</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269568:466</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269568:466</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.30" accession="ERS502046" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502046</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635692</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.30</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.30:466</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>98717</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>466</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269569:98" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520522">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520522</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269569:98</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269569:98</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269569:98</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.42" accession="ERS502047" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502047</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635693</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.42</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.42:98</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>56938</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>98</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269667:238" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520613">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520613</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269667:238</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269667:238</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269667:238</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.40" accession="ERS502145" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502145</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635791</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.40</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.40:238</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83514</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>238</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269668:483" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520614">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520614</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269668:483</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269668:483</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269668:483</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.49" accession="ERS502146" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502146</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635792</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.49</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.49:483</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>90432</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>483</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269669:374" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520615">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520615</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269669:374</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269669:374</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269669:374</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.1" accession="ERS502147" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502147</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635793</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.1</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.1:374</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>89894</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>374</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269670:352" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520616">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520616</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269670:352</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269670:352</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269670:352</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.72" accession="ERS502148" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502148</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635794</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.72</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.72:352</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78702</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>352</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269671:190" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520617">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520617</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269671:190</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269671:190</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269671:190</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.6" accession="ERS502149" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502149</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635795</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.6</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.6:190</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>2</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>190</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269672:103" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520618">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520618</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269672:103</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269672:103</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269672:103</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.50" accession="ERS502150" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502150</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635796</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.50</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.50:103</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>51472</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>103</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269835:305" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520245">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520245</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269835:305</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269835:305</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269835:305</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.23" accession="ERS501757" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501757</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635403</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.23</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.23:305</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>87516</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>305</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269836:529" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520246">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520246</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269836:529</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269836:529</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269836:529</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.52" accession="ERS501758" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501758</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635404</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.52</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.52:529</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>68451</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>529</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269837:293" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520247">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520247</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269837:293</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269837:293</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269837:293</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.11" accession="ERS501759" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501759</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635405</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.11</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.11:293</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>91431</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>293</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269838:89" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520248">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520248</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269838:89</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269838:89</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269838:89</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.33" accession="ERS501760" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501760</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635406</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.33</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.33:89</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>89186</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>89</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269839:340" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520249">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520249</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269839:340</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269839:340</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269839:340</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.60" accession="ERS501761" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501761</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635407</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.60</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.60:340</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>74774</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>340</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269840:317" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520250">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520250</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269840:317</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269840:317</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269840:317</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.36" accession="ERS501762" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501762</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635408</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.36</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.36:317</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78787</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>317</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269382:280" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520341">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520341</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269382:280</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269382:280</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269382:280</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.84" accession="ERS501860" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501860</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635506</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.84</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.84:280</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77880</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>280</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269383:75" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520342">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520342</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269383:75</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269383:75</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269383:75</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.16" accession="ERS501861" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501861</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635507</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.16</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.16:75</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69840</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>75</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269384:486" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520343">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520343</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269384:486</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269384:486</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269384:486</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.51" accession="ERS501862" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501862</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635508</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.51</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.51:486</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71946</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>486</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269385:18" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520344">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520344</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269385:18</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269385:18</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269385:18</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.35" accession="ERS501863" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501863</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635509</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.35</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.35:18</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70371</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>18</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269386:92" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520345">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520345</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269386:92</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269386:92</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269386:92</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.36" accession="ERS501864" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501864</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635510</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.36</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.36:92</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64072</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>92</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269387:112" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520346">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520346</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269387:112</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269387:112</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269387:112</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.6" accession="ERS501865" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501865</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635511</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.6</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.6:112</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>80302</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>112</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269472:475" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520427">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520427</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269472:475</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269472:475</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269472:475</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.40" accession="ERS501950" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501950</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635596</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.40</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.40:475</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>121822</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>475</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269473:462" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520428">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520428</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269473:462</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269473:462</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269473:462</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.26" accession="ERS501951" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501951</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635597</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.26</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.26:462</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82100</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>462</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269474:226" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520429">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520429</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269474:226</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269474:226</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269474:226</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.29" accession="ERS501952" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501952</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635598</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.29</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.29:226</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77821</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>226</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269475:82" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520430">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520430</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269475:82</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269475:82</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269475:82</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.23" accession="ERS501953" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501953</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635599</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.23</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.23:82</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>63258</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>82</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269476:507" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520431">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520431</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269476:507</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269476:507</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269476:507</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.21" accession="ERS501954" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501954</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635600</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.21</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.21:507</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>76403</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>507</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269477:517" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520432">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520432</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269477:517</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269477:517</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269477:517</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.34" accession="ERS501955" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501955</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635601</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.34</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.34:517</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>65700</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>517</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269570:537" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520523">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520523</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269570:537</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269570:537</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269570:537</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.61" accession="ERS502048" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502048</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635694</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.61</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.61:537</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>73002</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>537</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269571:289" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520524">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520524</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269571:289</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269571:289</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269571:289</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.93" accession="ERS502049" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502049</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635695</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.93</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.93:289</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>80464</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>289</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269572:266" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520525">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520525</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269572:266</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269572:266</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269572:266</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.70" accession="ERS502050" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502050</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635696</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.70</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.70:266</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71949</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>266</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269574:431" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520526">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520526</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269574:431</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269574:431</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269574:431</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.76" accession="ERS502052" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502052</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635698</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.76</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.76:431</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>95138</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>431</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269575:434" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520527">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520527</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269575:434</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269575:434</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269575:434</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.79" accession="ERS502053" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502053</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635699</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.79</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.79:434</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>90715</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>434</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269576:390" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520528">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520528</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269576:390</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269576:390</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269576:390</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.27" accession="ERS502054" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502054</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635700</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.27</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.27:390</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78375</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>390</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269673:420" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520619">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520619</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269673:420</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269673:420</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269673:420</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.65" accession="ERS502151" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502151</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635797</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.65</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.65:420</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>87490</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>420</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269674:285" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520620">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520620</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269674:285</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269674:285</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269674:285</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.9" accession="ERS502152" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502152</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635798</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.9</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.9:285</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>73761</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>285</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269675:419" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520621">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520621</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269675:419</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269675:419</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269675:419</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.64" accession="ERS502153" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502153</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635799</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.64</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.64:419</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>89956</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>419</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269676:222" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520622">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520622</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269676:222</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269676:222</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269676:222</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.24" accession="ERS502154" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502154</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635800</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.24</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.24:222</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71889</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>222</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269677:240" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520623">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520623</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269677:240</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269677:240</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269677:240</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.43" accession="ERS502155" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502155</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635801</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.43</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.43:240</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70810</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>240</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269678:264" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520624">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520624</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269678:264</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269678:264</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269678:264</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.69" accession="ERS502156" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502156</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635802</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.69</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.69:264</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71791</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>264</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269841:67" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520251">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520251</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269841:67</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269841:67</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269841:67</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.96" accession="ERS501763" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501763</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635409</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.96</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.96:67</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>96392</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>67</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269842:147" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520252">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520252</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269842:147</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269842:147</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269842:147</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.16" accession="ERS501764" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501764</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635410</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.16</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.16:147</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>147</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269844:488" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520253">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520253</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269844:488</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269844:488</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269844:488</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.53" accession="ERS501766" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501766</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635412</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.53</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.53:488</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>48567</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>488</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269845:338" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520254">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520254</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269845:338</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269845:338</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269845:338</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.58" accession="ERS501767" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501767</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635413</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.58</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.58:338</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64075</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>338</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269846:437" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520255">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520255</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269846:437</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269846:437</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269846:437</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.82" accession="ERS501768" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501768</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635414</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.82</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.82:437</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>80655</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>437</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269847:45" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520256">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520256</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269847:45</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269847:45</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269847:45</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.68" accession="ERS501769" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501769</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635415</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.68</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.68:45</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77890</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>45</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269388:166" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520347">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520347</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269388:166</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269388:166</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269388:166</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.36" accession="ERS501866" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501866</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635512</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.36</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.36:166</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>248945</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>166</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269389:66" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520348">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520348</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269389:66</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269389:66</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269389:66</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.95" accession="ERS501867" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501867</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635513</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.95</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.95:66</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>60003</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>66</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269390:379" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520349">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520349</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269390:379</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269390:379</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269390:379</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.14" accession="ERS501868" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501868</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635514</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.14</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.14:379</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>160097</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>379</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269391:116" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520350">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520350</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269391:116</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269391:116</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269391:116</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.63" accession="ERS501869" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501869</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635515</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.63</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.63:116</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>58660</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>116</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269392:263" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520351">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520351</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269392:263</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269392:263</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269392:263</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.68" accession="ERS501870" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501870</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635516</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.68</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.68:263</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70171</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>263</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269393:491" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520352">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520352</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269393:491</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269393:491</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269393:491</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.6" accession="ERS501871" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501871</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635517</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.6</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.6:491</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>58301</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>491</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269478:534" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520433">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520433</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269478:534</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269478:534</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269478:534</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.59" accession="ERS501956" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501956</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635602</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.59</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.59:534</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>75544</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>534</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269479:59" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520434">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520434</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269479:59</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269479:59</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269479:59</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.85" accession="ERS501957" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501957</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635603</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.85</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.85:59</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70056</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>59</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269480:441" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520435">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520435</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269480:441</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269480:441</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269480:441</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.87" accession="ERS501958" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501958</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635604</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.87</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.87:441</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>103304</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>441</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269481:9" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520436">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520436</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269481:9</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269481:9</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269481:9</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.21" accession="ERS501959" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501959</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635605</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.21</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.21:9</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>64931</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>9</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269482:314" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520437">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520437</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269482:314</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269482:314</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269482:314</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.32" accession="ERS501960" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501960</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635606</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.32</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.32:314</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>67074</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>314</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269483:464" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520438">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520438</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269483:464</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269483:464</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269483:464</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.28" accession="ERS501961" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501961</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635607</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.28</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.28:464</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>59059</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>464</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269577:202" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520529">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520529</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269577:202</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269577:202</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269577:202</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.70" accession="ERS502055" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502055</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635701</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.70</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.70:202</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>2</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>202</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269578:275" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520530">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520530</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269578:275</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269578:275</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269578:275</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.8" accession="ERS502056" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502056</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635702</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.8</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.8:275</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>75852</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>275</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269579:329" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520531">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520531</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269579:329</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269579:329</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269579:329</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.5" accession="ERS502057" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502057</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635703</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.5</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.5:329</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>93727</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>329</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269580:368" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520532">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520532</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269580:368</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269580:368</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269580:368</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.88" accession="ERS502058" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502058</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635704</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.88</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.88:368</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>85969</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>368</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269581:126" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520533">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520533</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269581:126</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269581:126</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269581:126</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.8" accession="ERS502059" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502059</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635705</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.8</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.8:126</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>78452</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>126</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269582:88" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520534">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520534</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269582:88</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269582:88</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269582:88</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.32" accession="ERS502060" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502060</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635706</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.32</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.32:88</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>81151</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>88</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269679:291" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520625">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520625</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269679:291</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269679:291</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269679:291</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.1" accession="ERS502157" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502157</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635803</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.1</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.1:291</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>87515</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>291</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269680:471" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520626">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520626</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269680:471</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269680:471</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269680:471</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.35" accession="ERS502158" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502158</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635804</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.35</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.35:471</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82847</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>471</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269681:397" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520627">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520627</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269681:397</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269681:397</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269681:397</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.34" accession="ERS502159" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502159</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635805</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.34</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.34:397</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>86453</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>397</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269683:548" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520628">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520628</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269683:548</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269683:548</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269683:548</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.78" accession="ERS502161" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502161</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635807</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.78</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.78:548</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>84651</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>548</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269684:297" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520629">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520629</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269684:297</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269684:297</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269684:297</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.16" accession="ERS502162" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502162</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635808</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.16</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.16:297</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>91703</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>297</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269685:401" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520630">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520630</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269685:401</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269685:401</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269685:401</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.39" accession="ERS502163" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502163</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635809</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.39</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.39:401</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>86143</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>401</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269848:551" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520257">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520257</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269848:551</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269848:551</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269848:551</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.84" accession="ERS501770" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501770</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635416</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.84</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.84:551</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>41723</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>551</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269849:95" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520258">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520258</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269849:95</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269849:95</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269849:95</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.4" accession="ERS501771" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501771</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635417</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.4</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.4:95</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>73538</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>95</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269851:306" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520259">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520259</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269851:306</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269851:306</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269851:306</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.24" accession="ERS501773" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501773</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635419</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.24</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.24:306</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>85203</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>306</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269852:177" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520260">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520260</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269852:177</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269852:177</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269852:177</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.47" accession="ERS501774" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501774</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635420</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.47</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.47:177</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>177</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269853:530" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520261">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520261</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269853:530</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269853:530</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269853:530</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.53" accession="ERS501775" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501775</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635421</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.53</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.53:530</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>91984</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>530</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269854:414" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520262">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520262</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269854:414</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269854:414</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269854:414</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.58" accession="ERS501776" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501776</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635422</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.58</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.58:414</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>69797</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>414</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269394:100" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520353">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520353</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269394:100</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269394:100</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269394:100</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.47" accession="ERS501872" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501872</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635518</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.47</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.47:100</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70323</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>100</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269395:119" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520354">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520354</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269395:119</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269395:119</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269395:119</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.7" accession="ERS501873" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501873</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635519</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.7</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.7:119</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>62029</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>119</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269396:259" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520355">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520355</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269396:259</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269396:259</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269396:259</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.64" accession="ERS501874" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501874</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635520</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.64</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.64:259</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>66902</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>259</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269397:181" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520356">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520356</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269397:181</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269397:181</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269397:181</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.51" accession="ERS501875" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501875</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635521</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.51</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.51:181</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>5</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>181</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269398:367" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520357">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520357</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269398:367</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269398:367</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269398:367</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.87" accession="ERS501876" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501876</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635522</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.87</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.87:367</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83310</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>367</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269399:120" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520358">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520358</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269399:120</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269399:120</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269399:120</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.72" accession="ERS501877" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501877</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635523</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.72</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.72:120</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>67183</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>120</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269484:47" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520439">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520439</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269484:47</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269484:47</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269484:47</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.71" accession="ERS501962" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501962</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635608</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.71</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.71:47</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>94096</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>47</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269485:384" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520440">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520440</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269485:384</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269485:384</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269485:384</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.2" accession="ERS501963" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501963</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635609</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.2</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.2:384</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>90343</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>384</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269486:349" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520441">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520441</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269486:349</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269486:349</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269486:349</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.7" accession="ERS501964" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501964</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635610</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.7</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.7:349</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82445</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>349</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269487:538" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520442">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520442</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269487:538</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269487:538</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269487:538</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.62" accession="ERS501965" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501965</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635611</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.62</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.62:538</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>41561</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>538</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269488:286" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520443">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520443</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269488:286</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269488:286</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269488:286</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.90" accession="ERS501966" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501966</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635612</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.90</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.90:286</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83082</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>286</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269489:543" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520444">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520444</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269489:543</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269489:543</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269489:543</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.70" accession="ERS501967" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501967</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635613</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.70</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.70:543</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>66428</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>543</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269583:487" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520535">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520535</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269583:487</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269583:487</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269583:487</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.52" accession="ERS502061" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502061</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635707</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.52</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.52:487</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>94972</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>487</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269584:399" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520536">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520536</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269584:399</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269584:399</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269584:399</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.36" accession="ERS502062" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502062</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635708</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.36</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.36:399</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>85443</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>399</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269585:32" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520537">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520537</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269585:32</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269585:32</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269585:32</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.54" accession="ERS502063" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502063</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635709</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.54</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.54:32</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>62874</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>32</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269586:481" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520538">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520538</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269586:481</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269586:481</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269586:481</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.47" accession="ERS502064" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502064</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635710</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.47</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.47:481</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>83889</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>481</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269587:145" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520539">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520539</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269587:145</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269587:145</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269587:145</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.14" accession="ERS502065" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502065</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635711</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.14</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.14:145</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>2</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>145</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269588:502" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520540">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520540</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269588:502</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269588:502</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269588:502</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.9" accession="ERS502066" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502066</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635712</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.9</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.9:502</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>57667</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>502</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269688:118" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520631">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520631</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269688:118</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269688:118</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269688:118</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.68" accession="ERS502166" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502166</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635812</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.68</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.68:118</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>48276</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>118</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269689:301" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520632">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520632</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269689:301</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269689:301</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269689:301</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.2" accession="ERS502167" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502167</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635813</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.2</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.2:301</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>86659</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>301</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269690:6" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520633">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520633</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269690:6</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269690:6</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269690:6</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.19" accession="ERS502168" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502168</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635814</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.19</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.19:6</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>70848</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>6</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269691:479" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520634">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520634</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269691:479</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269691:479</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269691:479</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.44" accession="ERS502169" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502169</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635815</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.44</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.44:479</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>210994</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>479</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269692:29" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520635">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520635</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269692:29</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269692:29</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269692:29</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.5" accession="ERS502170" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502170</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635816</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.5</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.5:29</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>95573</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>29</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269693:443" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520636">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520636</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269693:443</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269693:443</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269693:443</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.89" accession="ERS502171" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502171</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635817</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.89</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.89:443</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>71239</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>443</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269855:290" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520263">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520263</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269855:290</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269855:290</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269855:290</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.94" accession="ERS501777" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501777</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635423</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.94</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.94:290</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>96262</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>290</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269856:115" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520264">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520264</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269856:115</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269856:115</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269856:115</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.62" accession="ERS501778" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501778</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635424</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.62</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.62:115</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>56833</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>115</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269857:23" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520265">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520265</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269857:23</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269857:23</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269857:23</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.42" accession="ERS501779" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501779</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635425</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.42</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.42:23</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>63927</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>23</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269858:457" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520266">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520266</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269858:457</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269858:457</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269858:457</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.2" accession="ERS501780" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501780</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635426</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.2</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.2:457</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>47451</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>457</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269859:2" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520267">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520267</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269859:2</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269859:2</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269859:2</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.15" accession="ERS501781" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501781</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635427</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.15</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.15:2</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>44253</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>2</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269860:79" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520268">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520268</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269860:79</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269860:79</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269860:79</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.2" accession="ERS501782" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501782</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635428</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.2</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.2:79</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>66861</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>79</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269400:426" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520359">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520359</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269400:426</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269400:426</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269400:426</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.71" accession="ERS501878" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501878</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635524</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.71</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.71:426</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>99090</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>426</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269401:512" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520360">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520360</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269401:512</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269401:512</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269401:512</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.28" accession="ERS501879" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501879</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635525</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.28</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.28:512</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>95420</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>512</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269402:210" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520361">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520361</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269402:210</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269402:210</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269402:210</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.10" accession="ERS501880" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501880</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635526</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.10</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.10:210</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>90595</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>210</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269404:531" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520362">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520362</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269404:531</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269404:531</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269404:531</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.54" accession="ERS501882" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501882</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635528</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.54</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.54:531</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>68601</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>531</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269405:492" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520363">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520363</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269405:492</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269405:492</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269405:492</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate8.60" accession="ERS501883" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501883</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635529</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate8.60</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate8.60:492</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/4/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>40251</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>492</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269406:318" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520364">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520364</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269406:318</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269406:318</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269406:318</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.38" accession="ERS501884" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501884</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635530</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.38</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.38:318</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>68190</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>318</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269490:522" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520445">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520445</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269490:522</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269490:522</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269490:522</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate9.42" accession="ERS501968" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501968</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635614</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate9.42</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate9.42:522</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/19/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>76026</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>522</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269491:298" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520446">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520446</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269491:298</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269491:298</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269491:298</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.17" accession="ERS501969" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501969</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635615</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.17</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.17:298</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>77975</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>298</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269492:287" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520447">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520447</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269492:287</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269492:287</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269492:287</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.91" accession="ERS501970" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501970</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635616</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.91</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.91:287</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>73717</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>287</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269493:212" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520448">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520448</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269493:212</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269493:212</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269493:212</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.13" accession="ERS501971" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501971</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635617</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.13</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.13:212</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>85330</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>212</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269494:150" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520449">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520449</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269494:150</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269494:150</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269494:150</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.20" accession="ERS501972" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501972</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635618</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.20</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.20:150</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>5</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>150</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269495:310" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520450">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520450</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269495:310</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269495:310</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269495:310</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate6.29" accession="ERS501973" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS501973</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635619</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate6.29</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate6.29:310</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/31/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>63930</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>310</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269589:87" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520541">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520541</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269589:87</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269589:87</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269589:87</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.30" accession="ERS502067" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502067</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635713</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.30</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.30:87</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>66194</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>87</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269590:435" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520542">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520542</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269590:435</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269590:435</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269590:435</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.8" accession="ERS502068" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502068</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635714</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.8</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.8:435</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>90034</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>435</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269591:44" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520543">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520543</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269591:44</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269591:44</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269591:44</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.67" accession="ERS502069" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502069</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635715</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.67</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.67:44</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>91211</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>44</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269592:157" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520544">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520544</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269592:157</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269592:157</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269592:157</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate16.27" accession="ERS502070" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502070</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635716</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate16.27</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate16.27:157</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>8/14/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>1</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>157</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269593:255" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520545">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520545</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269593:255</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269593:255</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269593:255</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate5.59" accession="ERS502071" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502071</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635717</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate5.59</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate5.59:255</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>1/25/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>82147</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>255</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269594:60" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520546">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520546</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269594:60</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269594:60</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269594:60</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.86" accession="ERS502072" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502072</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635718</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.86</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.86:60</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>58099</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>60</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269694:58" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520637">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520637</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269694:58</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269694:58</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269694:58</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.83" accession="ERS502172" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502172</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635818</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.83</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.83:58</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>60892</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>58</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269695:418" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520638">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520638</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269695:418</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269695:418</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269695:418</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.63" accession="ERS502173" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502173</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635819</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.63</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.63:418</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>92444</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>418</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269696:70" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520639">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520639</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269696:70</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269696:70</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269696:70</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.11" accession="ERS502174" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502174</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635820</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.11</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.11:70</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>56567</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>70</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269697:14" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520640">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520640</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269697:14</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269697:14</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269697:14</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate14.30" accession="ERS502175" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502175</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635821</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate14.30</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate14.30:14</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/1/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>80059</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>14</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269699:377" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520641">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520641</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269699:377</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269699:377</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269699:377</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate7.12" accession="ERS502177" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502177</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635823</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate7.12</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate7.12:377</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>2/2/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>87119</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>377</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="qiime_experiment_2401:1269700:127" center_name="Colorado Center for Microbial Ecology, University of Colorado at Boulder" accession="ERX520642">
    <IDENTIFIERS>
      <PRIMARY_ID>ERX520642</PRIMARY_ID>
      <SUBMITTER_ID namespace="CCME-COLORADO">qiime_experiment_2401:1269700:127</SUBMITTER_ID>
      <SUBMITTER_ID namespace="Colorado Center for Microbial Ecology, University of Colorado at Boulder">qiime_experiment_2401:1269700:127</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>unspecified sequencing; qiime_experiment_2401:1269700:127</TITLE>
    <STUDY_REF refname="qiime_study_2401" accession="ERP006342" refcenter="CCME-COLORADO">
      <IDENTIFIERS>
        <PRIMARY_ID>ERP006342</PRIMARY_ID>
        <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401</SUBMITTER_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION>fecal samples from TwinsUK MiSeq runs</DESIGN_DESCRIPTION>
      <SAMPLE_DESCRIPTOR refname="qiime_study_2401:Plate15.80" accession="ERS502178" refcenter="CCME-COLORADO">
        <IDENTIFIERS>
          <PRIMARY_ID>ERS502178</PRIMARY_ID>
          <EXTERNAL_ID namespace="BioSample">SAMEA2635824</EXTERNAL_ID>
          <SUBMITTER_ID namespace="CCME-COLORADO">qiime_study_2401:Plate15.80</SUBMITTER_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_NAME>Plate15.80:127</LIBRARY_NAME>
        <LIBRARY_STRATEGY>AMPLICON</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>METAGENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>PCR</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <SINGLE/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>unspecified</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_title</TAG>
        <VALUE>TwinsUK Miseq</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_subfragment</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sample_center</TAG>
        <VALUE>Kings College London</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>sequencing_meth</TAG>
        <VALUE>sequencing by synthesis</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_date</TAG>
        <VALUE>4/3/13</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>pcr_primers</TAG>
        <VALUE>FWD:GTGCCAGCMGCCGCGGTAA; REV:GGACTACHVGGGTWTCTAAT</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>region</TAG>
        <VALUE>V4</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>run_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>num_sequences</TAG>
        <VALUE>105162</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>platform</TAG>
        <VALUE>Illumina</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>library_construction_protocol</TAG>
        <VALUE>This analysis was done as in Caporaso et al 2011 Genome research. The PCR primers F515 and R806 were developed against the V4 region of the 16S rRNA, both bacteria and archaea, which we determined would yield optimal community clustering with reads of this length The reverse PCR primer is barcoded with a 12-base error-correcting Golay code to facilitate multiplexing of up to 1,500 samples per lane, and both PCR primers contain sequencer adapter regions.</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>experiment_design_description</TAG>
        <VALUE>fecal samples from TwinsUK MiSeq runs</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>row_number</TAG>
        <VALUE>127</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>target_gene</TAG>
        <VALUE>16S rRNA</VALUE>
      </EXPERIMENT_ATTRIBUTE>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>study_center</TAG>
        <VALUE>Cornell</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
</EXPERIMENT_SET>
