AcetyleneNitrogenaseEthaneNitrogen FixationAlkynesTungstenAzotobacterNitrosomonasHydrocarbons, AcyclicEthylenesOxidation-ReductionMolybdoferredoxinHydrogenNitrous OxideDeltaproteobacteriaMolecular StructureMethaneAzotobacter vinelandiiMolybdenumPropaneSpirillumAmmoniaNitrogenStereoisomerismOxidoreductasesSoil MicrobiologyPhosphines