Acidithiobacillus caldus	-	744972	
Desulfovibrio vulgaris	-	742382	
Desulfovibrio vulgaris ATCC 29579	-	742382	
Methanocaldococcus jannaschii	CoB-CoM heterodisulfide reductase subunits A, B1, B2, C1, and C2; Methanococcus jannaschii	765831	
Methanocaldococcus jannaschii ATCC 43067	CoB-CoM heterodisulfide reductase subunits A, B1, B2, C1, and C2; Methanococcus jannaschii	765831	
Methanocaldococcus jannaschii DSM 2661	CoB-CoM heterodisulfide reductase subunits A, B1, B2, C1, and C2; Methanococcus jannaschii	765831	
Methanocaldococcus jannaschii JAL-1	CoB-CoM heterodisulfide reductase subunits A, B1, B2, C1, and C2; Methanococcus jannaschii	765831	
Methanocaldococcus jannaschii JCM 10045	CoB-CoM heterodisulfide reductase subunits A, B1, B2, C1, and C2; Methanococcus jannaschii	765831	
Methanocaldococcus jannaschii NBRC 100440	CoB-CoM heterodisulfide reductase subunits A, B1, B2, C1, and C2; Methanococcus jannaschii	765831	
Methanomassiliicoccus luminyensis	-	742500, 764654