Eubacterium limosum	-	485663	
Methanobacterium bryantii	-	485664	
Methanomethylovorans hollandica	-	756784	
Methanosarcina acetivorans	-	680470, 681980, 698630, 757103	
Methanosarcina barkeri	-	485660, 485661, 485662, 485665, 485666, 682524, 727819, 756784	
Methanosarcina barkeri	subunits MtaA and MtaB and MtaC	756274	
Methanosarcina barkeri DSM 800	-	727819	
Methanosarcina barkeri DSM 804	subunits MtaA and MtaB and MtaC	756274	
Methanosarcina mazei	-	726582, 756784	
Methanosphaera stadtmanae	-	756784	
Methanothermobacter thermautotrophicus	-	485663