MolybdenumPteridinesCoenzymesMetalloproteinsTungstenXanthine DehydrogenaseNitrate ReductasesAldehyde OxidaseNitrate ReductaseSulfite OxidaseSulfurtransferasesPterinsXanthine OxidaseTungsten CompoundsOxidoreductases Acting on Sulfur Group DonorsNitrogenaseCarbonyl Cyanide m-Chlorophenyl HydrazoneNitrate Reductase (NADH)SulfurAldehyde OxidoreductasesProtein CarbonylationMolybdoferredoxinOxidation-ReductionElectron Spin Resonance SpectroscopyOxidoreductasesIron Carbonyl CompoundsRhodobacter capsulatusIsotopesMetal Metabolism, Inborn ErrorsFormate DehydrogenasesIron-Sulfur ProteinsChloratesAzotobacter vinelandiiAldehydesXanthineCarbonyl Cyanide p-TrifluoromethoxyphenylhydrazoneOrganometallic CompoundsKetonesCatalysisSulfite DehydrogenaseAzotobacterSulfur OxidesSpectrophotometryEscherichia coliMolecular StructureKineticsDesulfovibrio gigasNitrogen FixationAlcohol OxidoreductasesDithioniteSulfitesIridiumMetalloexopeptidasesTracheobiontaModels, MolecularMolecular Sequence DataHydrogen-Ion ConcentrationOxygen IsotopesBacterial ProteinsSulfidesChlorellaTrace ElementsIronFormatesAmino Acid SequenceMilkNitratesMetalsCrystallography, X-RayNitrobacterBinding SitesPhenylhydrazinesMethanobacteriumCopperHumic SubstancesMolecular Conformation