title: Soil  DNA-SIP_fraction: labeled with 13C-Pal at timepoint 48 BD 1.67722824
design: DNA-SIP fractions samples fractionated from  CsCl gradient while unfractionated were just DNA extracts, PCR with V4 16S  rRNA primers, gel cleanup, then up to 192 samples sequenced together with  dual barcodes in Illumina MiSeq 2x250 V2 chemistry.