=_xlfn.CONCAT([1]Metagenome.environmental.1.0!$R41, ": ",[1]Metagenome.environmental.1.0!$B41)
The V4-V5 region of 16S rRNA genes of Bacteria and Archaea was amplified by PCR with the 515F  928R primer set, using GoTaq Long Master Mix (Promega)