Dinitrogenase 3 subunit alpha Nitrogenase iron-iron protein alpha chain anfD ANFD_RHOCA Nitrogenase component I 526 This iron-iron protein is part of the nitrogenase complex that catalyzes the key enzymatic reactions in nitrogen fixation. Other nitrogenase complexes utilize a molybdenum-iron protein or a vanadium-iron protein. MPYHEFEVSKCIPERREHAVMKAAGEDLTSCLPKGYLNTIPGTISERGCAYCGAKHVIGTPMKDVIHISHGPNGCTYDTWQTKRYISDNDNFQLKYTFATDVKEKHVVFGAEGLLKKSMHEAFDAFPNIKRMTVYQTCTTALIGDDVDAIAKEVMEERGDVDVFVCNSPGFAGPSQSGGHHKINIAWLNQKVGTVEPDYLGEHVINYVGEYNIQGDQEVMIDYFNRMGIQVLSTFTGNGSYDSLRMMHRAHLNVLECARSAEYICDELRARYGIPRLDIDGFGFEPLANSLRKVALFFGIEDKAEAIIAEEYAKWKPQLDWYKERLKGKKVCLWPGGSKLWHWAHAIEEEMGLKVVSVYTKFGHQGDMEKGVSRCGEGALAIDDPNELESVEAIEMLKPDIIFTGKRPGEFVKKHGVPYLNAHAYHNGPYKGFEGWVRFARDIYNAIYSPMRQLAALDISAPDAAITSGFRTAKMNADLTVSDEVKFSEVLHEYTGKYDSIAEIRARNQPMPPSRKLRDAVQPAAE