"PMID:12866859"^^ . "ncbi_taxonomy"^^ . "Methanosarcina frisius"^^ . "Methanosarcina frisia"^^ . . "Methanococcus mazei"^^ . "GC_ID:11"^^ . "Methanococcus frisius"^^ . . "NCBITaxon:225469"^^ . . "Methanosarcina mazei"^^ . "NCBITaxon:2212"^^ . "Methanosarcina mazeii"^^ .