CatalysisNitric Oxide SynthaseNitric Oxide Synthase Type IIOxidesNitric Oxide Synthase Type IIINitric Oxide Synthase Type IKineticsBiocatalysisCatalytic DomainModels, MolecularNitrogen OxidesSubstrate SpecificityBinding SitesZinc OxideArginineCrystallography, X-RayMolecular Sequence DataMutagenesis, Site-DirectedAmino Acid SequenceNG-Nitroarginine Methyl EsterNitritesEnzyme InhibitorsProtein ConformationEscherichia coliModels, ChemicalOxidation-Reductionomega-N-MethylarginineHydrogen-Ion ConcentrationNitratesAmino Acid OxidoreductasesMolecular StructureRecombinant ProteinsRNA, CatalyticHydrolysisHistidineProtein BindingStereoisomerismProtein Structure, TertiaryStructure-Activity RelationshipCyclic GMPBase SequenceS-Nitroso-N-AcetylpenicillamineAntibodies, CatalyticNitroso CompoundsMutationSequence Homology, Amino AcidNitroprussideHydrogen BondingPenicillamineAmino Acid SubstitutionEndothelium, VascularFerrosoferric OxideOxygenEnzyme StabilityOxidoreductasesEnzymesMetalsFerric CompoundsCysteineMagnesium OxideAspartic AcidVasodilationDose-Response Relationship, DrugProtein Structure, SecondaryCitrullineGuanylate CyclaseSequence AlignmentThermodynamicsRats, Sprague-DawleyMagnesiumEnzyme ActivationS-NitrosoglutathioneElectron Spin Resonance SpectroscopyAdenosine TriphosphateBiopterinMolsidomineMolecular ConformationBacterial ProteinsSpectrophotometryCells, CulturedProtonsLysineHemeDeuterium OxideCloning, MolecularRats, WistarVasodilator AgentsNADPAluminum OxideConserved SequenceEpoxy CompoundsManganeseTyrosineCattleTemperatureTime FactorsS-NitrosothiolsSulfhydryl CompoundsIsoenzymesAlkenes