>sp|P95296|NIFK_METTM Nitrogenase molybdenum-iron protein beta chain OS=Methanothermobacter marburgensis (strain ATCC BAA-927 / DSM 2133 / JCM 14651 / NBRC 100331 / OCM 82 / Marburg) OX=79929 GN=nifK PE=3 SV=1 MPEINVMERGRELVVNPLVTCQPFGAMFATLGIRRGLPLVHGSQGCSTFVRYGLNRHFRE PAEIAVTSLHEDAAVFGGRSNIINGVKNLVKRFRPDLVGIVTTCSSEIIGDDVDGFMRVA ETELREELGDRFQTKLVHISTPSFVENHFRGYGNAIKSFIETLSREDGDCNHKLNIIPGI VNPGDIREIGHMLGLMDITPIILTDTSDPFDSPLRPSKTEQMPFYPPGGTAVPEIEDSSN SMGTLSLTMYGDEALNTLEKRFRVPGEYSMPIGVRNTDDFVRRAARISEKDVSDELLDER GILIDSMADLSSRYLFGRTAAVYGDPDMVAGISRFLCELGITPLHTCTGTDNELFIDRMK TVAAEADERINVMVKSDLRALEERLSEEPVDLMIGNSDGRLIAQDLGIPLVRVGYPVYDR VGYQRVPITGYRGAVNLLNRITNTVLREYYEPQHWKLQQ