title: The role of dihydrogen and hydrogenase in nitrogen fixation.
mesh_terms: D003013:Clostridium / Q000201:enzymology; D003901:Desulfovibrio / Q000201:enzymology; D006859:Hydrogen / Q000378:metabolism*; D009586:Nitrogen Fixation; D009591:Nitrogenase / Q000378:metabolism*; D010088:Oxidoreductases / Q000378:metabolism*
chemical_list: D006859:Hydrogen; D010088:Oxidoreductases; D009591:Nitrogenase