SEARCH Articles Figures Tables Azotobacter molybdenum-iron protein Iron protein proteins Molybdenum iron protein cofactor Molybdenum iron protein cofactor structure Molybdenum iron protein structure Molybdenum nitrogenase iron proteins Molybdenum protein Molybdenum-iron protein in nitrogenase Molybdenum-iron protein, nitrogenase properties Nitrogen molybdenum iron protein Nitrogenase molybdenum-iron protein FeMo-cofactor Nitrogenase molybdenum-iron protein structure