MolybdenumPteridinesCoenzymesMetalloproteinsSulfurtransferasesNitrate ReductasesNitrate ReductaseAldehyde OxidasePterinsXanthine DehydrogenaseTungstenSulfite OxidaseTungsten CompoundsOxidoreductases Acting on Sulfur Group DonorsMetal Metabolism, Inborn ErrorsChloratesXanthine OxidaseSulfurMolybdoferredoxinAldehyde OxidoreductasesIron-Sulfur ProteinsNitrate Reductase (NADH)OxidoreductasesRhodobacter capsulatusXanthineMetalloexopeptidasesFormate DehydrogenasesEscherichia coliSulfite DehydrogenaseGuanine NucleotidesSulfidesElectron Spin Resonance SpectroscopyApoenzymesSulfitesMolecular Sequence DataEscherichia coli ProteinsPurine-Pyrimidine Metabolism, Inborn ErrorsOxidation-ReductionNitrogenaseSpectrophotometryBrain Diseases, Metabolic, InbornAmino Acid SequenceOrganometallic CompoundsGuanosine MonophosphateCarbon-Sulfur LyasesHeparin Cofactor IIBacterial ProteinsMutationCalnexinSequence Homology, Amino AcidModels, MolecularKineticsCatalysisCrystallography, X-RayArabidopsis ProteinsBinding SitesApoproteinsProtein BindingNitratesChromatography, GelProtein Structure, TertiaryAzotobacter vinelandiiIsotopesCysteineArabidopsisGenetic Complementation TestMolecular StructureMutagenesis, Site-DirectedCloning, MolecularRhodobacter sphaeroidesCatalytic DomainGenes, BacterialNucleotidyltransferasesBase SequenceAzotobacterCarrier ProteinsProtein ConformationMolecular WeightSequence AlignmentRecombinant ProteinsElectrophoresis, Polyacrylamide GelConserved SequenceChromatography, High Pressure LiquidMolecular ChaperonesPQQ CofactorGene Expression Regulation, BacterialNitrogen FixationTwo-Hybrid System TechniquesEnzyme ActivationDithionitePlant ProteinsSpectrometry, FluorescenceDesulfovibrio gigasFlavin-Adenine DinucleotideStructure-Activity RelationshipModels, BiologicalMembrane ProteinsGene Deletion