>sp|Q58253|MCRD_METJA Methyl-coenzyme M reductase I operon protein D OS=Methanocaldococcus jannaschii GN=mcrD MFMIEVEIFPHRYLKASTTEKFLNKIYDLKTVERVVIHGQPLPKVITYGPARGLPVNHTE RKIIHVKGVPVELTVMAGRFWITLSDDSELDKLDEICKEMFPFGYNLRVGKFLKDRPTVT DYIKYGEDGVFLINEMDRRLIGMVDPRSRMANSVTVVEKEEKEE