AcetylenePolymerizationNitrogenaseEthaneNitrogen FixationAlkynesTungstenPolymersActinsBiopolymersAzotobacterNitrosomonasHydrocarbons, AcyclicEthylenesMolybdoferredoxinOxidation-ReductionNitrous OxideHydrogenDeltaproteobacteriaTubulinAzotobacter vinelandiiKineticsMethaneMolybdenumActin CytoskeletonHemoglobin, SickleMicrofilament ProteinsSpirillumPropaneMicrotubulesAmmoniaNitrogen