SRX4557787 M-ALM-9 SRP158070 PRJNA485676 modified 341F-modified 806R SRS3674729 SAMN09812538 M-ALM-9 AMPLICON METAGENOMIC PCR Illumina MiSeq SRX4557788 M-ALM-8 SRP158070 PRJNA485676 modified 341F-modified 806R SRS3674730 SAMN09812537 M-ALM-8 AMPLICON METAGENOMIC PCR Illumina MiSeq SRX4557789 M-ALM-7 SRP158070 PRJNA485676 modified 341F-modified 806R SRS3674731 SAMN09812536 M-ALM-7 AMPLICON METAGENOMIC PCR Illumina MiSeq