MolybdenumPteridinesCoenzymesMetalloproteinsTungstenCatalysisXanthine DehydrogenaseNitrate ReductasesAldehyde OxidaseNitrate ReductaseSulfite OxidaseSulfurtransferasesPterinsAlkenesTungsten CompoundsXanthine OxidasePalladiumOxidoreductases Acting on Sulfur Group DonorsNitrogenaseNitrate Reductase (NADH)SulfurOrganometallic CompoundsStereoisomerismRutheniumAldehyde OxidoreductasesOxidation-ReductionMolecular StructureMolybdoferredoxinElectron Spin Resonance SpectroscopyRhodobacter capsulatusOxidoreductasesCyclizationIsotopesRhodiumIridiumHydrogenationMetal Metabolism, Inborn ErrorsAminationFormate DehydrogenasesIron-Sulfur ProteinsKetonesPhosphinesChloratesAzotobacter vinelandiiXanthineChemistry, OrganicLewis AcidsKineticsSulfite DehydrogenaseAzotobacterRecyclingAlcoholsAlkynesEscherichia coliAldehydesDesulfovibrio gigasCopperModels, MolecularNitrogen FixationIminesDithioniteMetalsSpectrophotometryMetalloporphyrinsMetalloexopeptidasesTracheobiontaSulfidesFormatesMolecular Sequence DataCinchona AlkaloidsSulfitesNitratesBiocatalysisModels, ChemicalIronAlkadienesNickelHydrogenCrystallography, X-RayBacterial ProteinsChlorellaTrace ElementsHydrogen-Ion ConcentrationAminesMilkOrganic Chemistry ProcessesAmino Acid SequenceNitrobacterSubstrate SpecificityBinding SitesMethanobacteriumMolecular ConformationHumic Substances