ANFK_AZOVI Dinitrogenase 3 subunit beta anfK Nitrogenase component I Nitrogenase iron-iron protein beta chain 462 MTCEVKEKGRVGTINPIFTCQPAGAQFVSIGIKDCIGIVHGGQGCVMFVRLIFSQHYKESFELASSSLHEDGAVFGACGRVEEAVDVLLSRYPDVKVVPIITTCSTEIIGDDVDGVIKKLNEGLLKEKFPDREVHLIAMHTPSFVGSMISGYDVAVRDVVRHFAKREAPNDKINLLTGWVNPGDVKELKHLLGEMDIEANVLFEIESFDSPILPDGSAVSHGNTTIEDLIDTGNARATFALNRYEGTKAAEYLQKKFEIPAIIGPTPIGIRNTDIFLQNLKKATGKPIPQSLAHERGVAIDALADLTHMFLAEKRVAIYGAPDLVIGLAEFCLDLEMKPVLLLLGDDNSKYVDDPRIKALQENVDYGMEIVTNADFWELENRIKNEGLELDLILGHSKGRFISIDYNIPMLRVGFPTYDRAGLFRYPTVGYGGAIWLAEQMANTLFADMEHKKNKEWVLNVW 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.