MPHHEFECSKVIPERKKHAVIKGKGETLADALPQGYLNTIPGSISERGCAYCGAKHVIGTPMKDVIHISHGPVGCTYDTWQTKRYISDNDNFQLKYTYATDVKEKHIVFGAEKLLKQNIIEAFKAFPQIKRMTIYQTCATALIGDDINAIAEEVMEEMPEVDIFVCNSPGFAGPSQSGGHHKINIAWINQKVGTVEPEITGDHVINYVGEYNIQGDQEVMVDYFKRMGIQVLSTFTGNGSYDGLRAMHRAHLNVLECARSAEYICNELRVRYGIPRLDIDGFGFKPLADSLRKIGMFFGIEDRAKAIIDEEVARWKPELDWYKERLMGKKVCLWPGGSKLWHWAHVIEEEMGLKVVSVYIKFGHQGDMEKGIARCGEGTLAIDDPNELEGLEALEMLKPDIILTGKRPGEVAKKVRVPYLNAHAYHNGPYKGFEGWVRFARDIYNAIYSPIHQLSGIDITKDNAPEWGNGFRTRQMLSDGNLSDAVRNSETLRQYTGGYDSVSKLREREYPAFERKVG anfD Dinitrogenase 3 subunit alpha Nitrogenase component I Nitrogenase iron-iron protein alpha chain ANFD_AZOVI 518 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.