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	
Methanomassiliicoccus luminyensis DSM 25720	-	742500	
Methanosarcina acetivorans	-	743210, 745797	
Methanospirillum hungatei	-	765833	
Methanothermobacter marburgensis	-	745383	
Methanothermobacter marburgensis	subunit HdrB	744307	
Methanothermobacter wolfeii	-	765831	
Methanothermococcus thermolithotrophicus	CoB-CoM heterodisulfide reductase iron-sulfur subunit A	764472	
Methanothermococcus thermolithotrophicus	CoB-CoM heterodisulfide reductase subunits A, B, and C	764753, 765831	
Methanothermococcus thermolithotrophicus DSM 2095	CoB-CoM heterodisulfide reductase iron-sulfur subunit A	764472	
Methanothermococcus thermolithotrophicus DSM 2095	CoB-CoM heterodisulfide reductase subunits A, B, and C	764753, 765831