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    <TITLE>GSM3611362: LacZ_6hpf_1; Ciona robusta; ATAC-seq</TITLE>
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        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
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    <TITLE>GSM3611363: LacZ_6hpf_2; Ciona robusta; ATAC-seq</TITLE>
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        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
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      <PRIMARY_ID>SRX5388168</PRIMARY_ID>
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    <TITLE>GSM3611364: LacZ_6hpf_3; Ciona robusta; ATAC-seq</TITLE>
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        <PRIMARY_ID>SRP186173</PRIMARY_ID>
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          <PAIRED/>
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        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
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        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
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      <PRIMARY_ID>SRX5388169</PRIMARY_ID>
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    <TITLE>GSM3611365: LacZ_10hpf_1; Ciona robusta; ATAC-seq</TITLE>
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        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
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        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
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    <TITLE>GSM3611366: LacZ_10hpf_2; Ciona robusta; ATAC-seq</TITLE>
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        <PRIMARY_ID>SRP186173</PRIMARY_ID>
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        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
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    <TITLE>GSM3611367: LacZ_10hpf_3; Ciona robusta; ATAC-seq</TITLE>
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        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
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        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
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    <TITLE>GSM3611368: LacZ_10hpf_4; Ciona robusta; ATAC-seq</TITLE>
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        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
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        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
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    <TITLE>GSM3611369: dnFGFR_10hpf_1; Ciona robusta; ATAC-seq</TITLE>
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        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611369</ID>
          <LABEL>GSM3611369</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611369</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611370" accession="SRX5388174">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388174</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611370</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611370: dnFGFR_10hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376617">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376617</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611370</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
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        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611370</ID>
          <LABEL>GSM3611370</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611370</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611371" accession="SRX5388175">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388175</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611371</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611371: dnFGFR_10hpf_3; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376618">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376618</PRIMARY_ID>
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      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
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        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611371</ID>
          <LABEL>GSM3611371</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611371</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611372" accession="SRX5388176">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388176</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611372</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611372: MekMut_10hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376619">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376619</PRIMARY_ID>
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        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
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        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611372</ID>
          <LABEL>GSM3611372</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611372</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611373" accession="SRX5388177">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388177</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611373</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611373: MekMut_10hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376620">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376620</PRIMARY_ID>
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        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611373</ID>
          <LABEL>GSM3611373</LABEL>
        </XREF_LINK>
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    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611373</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611374" accession="SRX5388178">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388178</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611374</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611374: MekMut_10hpf_3; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376621">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376621</PRIMARY_ID>
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        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
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        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611374</ID>
          <LABEL>GSM3611374</LABEL>
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    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611374</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
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  <EXPERIMENT alias="GSM3611375" accession="SRX5388179">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388179</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611375</SUBMITTER_ID>
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    <TITLE>GSM3611375: FoxF_KO_10hpf_1; Ciona robusta; ATAC-seq</TITLE>
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      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
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    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376622">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376622</PRIMARY_ID>
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      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
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        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611375</ID>
          <LABEL>GSM3611375</LABEL>
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    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611375</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
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  <EXPERIMENT alias="GSM3611376" accession="SRX5388180">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388180</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611376</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611376: FoxF_KO_10hpf_2; Ciona robusta; ATAC-seq</TITLE>
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      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
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    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376623">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376623</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611376</EXTERNAL_ID>
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      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
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        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611376</ID>
          <LABEL>GSM3611376</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611376</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611377" accession="SRX5388181">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388181</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611377</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611377: FoxF_KO_10hpf_3; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376624">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376624</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611377</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611377</ID>
          <LABEL>GSM3611377</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611377</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611378" accession="SRX5388182">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388182</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611378</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611378: Ngn_KO_10hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376625">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376625</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611378</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611378</ID>
          <LABEL>GSM3611378</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611378</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611379" accession="SRX5388183">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388183</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611379</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611379: Ngn_KO_10hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376626">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376626</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611379</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611379</ID>
          <LABEL>GSM3611379</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611379</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611380" accession="SRX5388184">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388184</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611380</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611380: Ngn_KO_10hpf_3; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376627">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376627</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611380</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611380</ID>
          <LABEL>GSM3611380</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611380</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611381" accession="SRX5388185">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388185</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611381</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611381: dnFGFR_15hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376628">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376628</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611381</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611381</ID>
          <LABEL>GSM3611381</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611381</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611382" accession="SRX5388186">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388186</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611382</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611382: dnFGFR_15hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376629">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376629</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611382</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611382</ID>
          <LABEL>GSM3611382</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611382</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611383" accession="SRX5388187">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388187</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611383</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611383: dnFGFR_18hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376630">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376630</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611383</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611383</ID>
          <LABEL>GSM3611383</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611383</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611384" accession="SRX5388188">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388188</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611384</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611384: dnFGFR_18hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376631">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376631</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611384</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611384</ID>
          <LABEL>GSM3611384</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611384</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611385" accession="SRX5388189">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388189</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611385</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611385: dnFGFR_18hpf_3; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376632">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376632</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611385</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611385</ID>
          <LABEL>GSM3611385</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611385</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611386" accession="SRX5388190">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388190</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611386</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611386: dnFGFR_18hpf_4; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376633">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376633</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611386</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611386</ID>
          <LABEL>GSM3611386</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611386</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611387" accession="SRX5388191">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388191</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611387</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611387: dnFGFR_18hpf_5; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376634">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376634</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611387</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611387</ID>
          <LABEL>GSM3611387</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611387</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611388" accession="SRX5388192">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388192</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611388</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611388: dnFGFR_20hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376635">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376635</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611388</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611388</ID>
          <LABEL>GSM3611388</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611388</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611389" accession="SRX5388193">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388193</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611389</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611389: dnFGFR_20hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376636">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376636</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611389</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611389</ID>
          <LABEL>GSM3611389</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611389</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611390" accession="SRX5388194">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388194</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611390</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611390: Ef1a_10hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376637">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376637</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611390</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611390</ID>
          <LABEL>GSM3611390</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611390</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611391" accession="SRX5388195">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388195</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611391</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611391: Ef1a_10hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376638">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376638</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611391</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611391</ID>
          <LABEL>GSM3611391</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611391</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611392" accession="SRX5388196">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388196</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611392</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611392: gfp_10hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376639">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376639</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611392</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611392</ID>
          <LABEL>GSM3611392</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611392</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611393" accession="SRX5388197">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388197</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611393</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611393: gfp_10hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376640">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376640</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611393</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611393</ID>
          <LABEL>GSM3611393</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611393</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611394" accession="SRX5388198">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388198</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611394</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611394: gfp_10hpf_3; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376641">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376641</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611394</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611394</ID>
          <LABEL>GSM3611394</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611394</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611395" accession="SRX5388199">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388199</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611395</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611395: gfp_15hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376642">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376642</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611395</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611395</ID>
          <LABEL>GSM3611395</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611395</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611396" accession="SRX5388200">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388200</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611396</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611396: gfp_15hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376643">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376643</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611396</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611396</ID>
          <LABEL>GSM3611396</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611396</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611397" accession="SRX5388201">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388201</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611397</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611397: gfp_18hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376644">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376644</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611397</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611397</ID>
          <LABEL>GSM3611397</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611397</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611398" accession="SRX5388202">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388202</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611398</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611398: gfp_18hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376645">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376645</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611398</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611398</ID>
          <LABEL>GSM3611398</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611398</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611399" accession="SRX5388203">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388203</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611399</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611399: gfp_18hpf_3; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376646">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376646</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611399</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611399</ID>
          <LABEL>GSM3611399</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611399</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611400" accession="SRX5388204">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388204</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611400</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611400: gfp_18hpf_4; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376647">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376647</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611400</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611400</ID>
          <LABEL>GSM3611400</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611400</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611401" accession="SRX5388205">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388205</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611401</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611401: gfp_20hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376648">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376648</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611401</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611401</ID>
          <LABEL>GSM3611401</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611401</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611402" accession="SRX5388206">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388206</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611402</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611402: LacZ_15hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376649">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376649</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611402</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611402</ID>
          <LABEL>GSM3611402</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611402</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611403" accession="SRX5388207">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388207</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611403</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611403: LacZ_15hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376650">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376650</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611403</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611403</ID>
          <LABEL>GSM3611403</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611403</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611404" accession="SRX5388208">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388208</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611404</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611404: LacZ_18hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376651">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376651</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611404</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611404</ID>
          <LABEL>GSM3611404</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611404</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611405" accession="SRX5388209">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388209</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611405</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611405: LacZ_18hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376652">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376652</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611405</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611405</ID>
          <LABEL>GSM3611405</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611405</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611406" accession="SRX5388210">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388210</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611406</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611406: LacZ_18hpf_3; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376653">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376653</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611406</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611406</ID>
          <LABEL>GSM3611406</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611406</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611407" accession="SRX5388211">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388211</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611407</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611407: LacZ_18hpf_4; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376654">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376654</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611407</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611407</ID>
          <LABEL>GSM3611407</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611407</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611408" accession="SRX5388212">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388212</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611408</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611408: LacZ_20hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376655">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376655</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611408</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611408</ID>
          <LABEL>GSM3611408</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611408</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611409" accession="SRX5388213">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388213</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611409</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611409: LacZ_20hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376656">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376656</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611409</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611409</ID>
          <LABEL>GSM3611409</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611409</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611410" accession="SRX5388214">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388214</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611410</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611410: MekMut_18hpf_1; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376657">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376657</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611410</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611410</ID>
          <LABEL>GSM3611410</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611410</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611411" accession="SRX5388215">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388215</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611411</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611411: MekMut_18hpf_2; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376658">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376658</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611411</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611411</ID>
          <LABEL>GSM3611411</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611411</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611412" accession="SRX5388216">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388216</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611412</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611412: MekMut_18hpf_3; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376659">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376659</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611412</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611412</ID>
          <LABEL>GSM3611412</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611412</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611413" accession="SRX5388217">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388217</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611413</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611413: gDNA; Ciona robusta; ATAC-seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376660">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376660</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611413</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>ATAC-seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>GENOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>other</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611413</ID>
          <LABEL>GSM3611413</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611413</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611414" accession="SRX5388218">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388218</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611414</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611414: RNA-seq_FoxF_KO_10hpf_1; Ciona robusta; RNA-Seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376661">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376661</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611414</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>RNA-Seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>TRANSCRIPTOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>cDNA</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611414</ID>
          <LABEL>GSM3611414</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611414</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611415" accession="SRX5388219">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388219</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611415</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611415: RNA-seq_FoxF_KO_10hpf_2; Ciona robusta; RNA-Seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376662">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376662</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611415</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>RNA-Seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>TRANSCRIPTOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>cDNA</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611415</ID>
          <LABEL>GSM3611415</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611415</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611416" accession="SRX5388220">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388220</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611416</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611416: RNA-seq_LacZ_10hpf_1; Ciona robusta; RNA-Seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376663">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376663</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611416</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>RNA-Seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>TRANSCRIPTOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>cDNA</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611416</ID>
          <LABEL>GSM3611416</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611416</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611417" accession="SRX5388221">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388221</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611417</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611417: RNA-seq_LacZ_10hpf_2; Ciona robusta; RNA-Seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376664">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376664</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611417</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>RNA-Seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>TRANSCRIPTOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>cDNA</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611417</ID>
          <LABEL>GSM3611417</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611417</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611418" accession="SRX5388222">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388222</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611418</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611418: RNA-seq_Ngn_KO_10hpf_1; Ciona robusta; RNA-Seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376665">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376665</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611418</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>RNA-Seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>TRANSCRIPTOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>cDNA</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611418</ID>
          <LABEL>GSM3611418</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611418</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
  <EXPERIMENT alias="GSM3611419" accession="SRX5388223">
    <IDENTIFIERS>
      <PRIMARY_ID>SRX5388223</PRIMARY_ID>
      <SUBMITTER_ID namespace="GEO">GSM3611419</SUBMITTER_ID>
    </IDENTIFIERS>
    <TITLE>GSM3611419: RNA-seq_Ngn_KO_10hpf_2; Ciona robusta; RNA-Seq</TITLE>
    <STUDY_REF accession="SRP186173" refname="GSE126691">
      <IDENTIFIERS>
        <PRIMARY_ID>SRP186173</PRIMARY_ID>
      </IDENTIFIERS>
    </STUDY_REF>
    <DESIGN>
      <DESIGN_DESCRIPTION/>
      <SAMPLE_DESCRIPTOR accession="SRS4376666">
        <IDENTIFIERS>
          <PRIMARY_ID>SRS4376666</PRIMARY_ID>
          <EXTERNAL_ID namespace="GEO">GSM3611419</EXTERNAL_ID>
        </IDENTIFIERS>
      </SAMPLE_DESCRIPTOR>
      <LIBRARY_DESCRIPTOR>
        <LIBRARY_STRATEGY>RNA-Seq</LIBRARY_STRATEGY>
        <LIBRARY_SOURCE>TRANSCRIPTOMIC</LIBRARY_SOURCE>
        <LIBRARY_SELECTION>cDNA</LIBRARY_SELECTION>
        <LIBRARY_LAYOUT>
          <PAIRED/>
        </LIBRARY_LAYOUT>
        <LIBRARY_CONSTRUCTION_PROTOCOL>Nulcei were isolated from FACSorted cells and incubated in the tagmentation reaction. Tagmented-chromatin fragmented were PCR amplified and purified. The quality of ATAC-seq libraries was assessed by using 2100 Bioanalyzer (Agilent Technologies). ATAC-seq was performed with minor modifications to the published protocol (Buenrostro et al., 2013). 3000-5000 cells obtained by FACS were centrifuged at 800 x g for 4 min at 4 °C for each sample. Cells were resuspended in 5 µL of cold lysis buffer (10 mM Tris-HCl [pH 7.4], 10 nM NaCL, 3 nM MgCl2, 0,1% v/v Igepal CA-360 [Sigma-Aldrich] and incubated on ice for 5 min. After centrifugation of the cells at 500 x g for 10 min at 4 °C, the supernatant was discarded.  The tagmentation reaction was performed at 37 °C for 30 min using Nextera Sample Preparation kit (Illumina). After tagmentation, transposed DNA fragments were amplified using the following PCR condition: 1 cycle of 72°C for 5 min and 98°C for 30 s, followed by 12 to 14 cycles of 98°C for 10 s, 63°C for 30 s and 72°C for 1 min. Amplified libraries were purified using PCR purification MinElute kit (Qiagen), and the quality of of the purified library was assessed by using 2100 Bioanalyzer (Agilent Technologies) and a High Sensitivity DNA analysis Kit (Agilent Technologies) to confirm a period pattern in the size of the amplified DNA. After size selection by using Agencourt Ampure XP beads (Beckman Coulter, Cat#A633880) with a bead-to-sample ratio of 1.8:1, the libraries were sequenced as paired-end 50 bp by using the HiSeq 2500 platform (Illumina) according to the manufacturer's instructions. An input control was also generated by using 10 ng of C. robusta genomic DNA.</LIBRARY_CONSTRUCTION_PROTOCOL>
      </LIBRARY_DESCRIPTOR>
    </DESIGN>
    <PLATFORM>
      <ILLUMINA>
        <INSTRUMENT_MODEL>Illumina HiSeq 2500</INSTRUMENT_MODEL>
      </ILLUMINA>
    </PLATFORM>
    <EXPERIMENT_LINKS>
      <EXPERIMENT_LINK>
        <XREF_LINK>
          <DB>gds</DB>
          <ID>303611419</ID>
          <LABEL>GSM3611419</LABEL>
        </XREF_LINK>
      </EXPERIMENT_LINK>
    </EXPERIMENT_LINKS>
    <EXPERIMENT_ATTRIBUTES>
      <EXPERIMENT_ATTRIBUTE>
        <TAG>GEO Accession</TAG>
        <VALUE>GSM3611419</VALUE>
      </EXPERIMENT_ATTRIBUTE>
    </EXPERIMENT_ATTRIBUTES>
  </EXPERIMENT>
</EXPERIMENT_SET>
