>sp|Q58273|HDRB2_METJA CoB--CoM heterodisulfide reductase subunit B 2 OS=Methanocaldococcus jannaschii GN=hdrB2 MKYAFFLGCIMPHRYPGVEKATKIVMEELGVELEYMPGASCCPAPGVFGSFDQKTWLTLA ARNLCIAEEMGLDIVTVCNGCYGSLFEAAHILHENKEALDFVNEKLDKIGKQYKGTIKVR HFAELIYKDIGVDKIKEKVVKPLDVLNVAIHYGCHFLKPSDVKHLDSPERPKLLEEIVAA TGAKPVMYRDYLMCCGAGGGVRARFLPTALDMTKEKIRNMLEAGADCTVNVCPFCHLQFD RGQVEIKEKFGEEYKLPVLHLSQLLGLAFGMKPEDLAVSVHAIPVDPVLKKLGIE