CatalysisEnzymesBiocatalysisCatalytic DomainKineticsModels, MolecularProtein ConformationBinding SitesModels, ChemicalHydrogen-Ion ConcentrationSubstrate SpecificityCrystallography, X-RayMutagenesis, Site-DirectedMolecular Sequence DataAmino Acid SequenceEscherichia coliRNA, CatalyticHydrolysisHistidineMolecular StructureProtein Structure, TertiaryProtein BindingStructure-Activity RelationshipRecombinant ProteinsAntibodies, CatalyticOxidation-ReductionStereoisomerismSequence Homology, Amino AcidHydrogen BondingBase SequenceMutationAmino Acid SubstitutionEnzyme StabilityAspartic AcidMetalsProtein Structure, SecondaryThermodynamicsMagnesiumSequence AlignmentCysteineProtonsMolecular ConformationBacterial ProteinsConserved SequenceCloning, MolecularOxidoreductasesAdenosine TriphosphateSpectrophotometryLysineProton-Translocating ATPasesNucleic Acid ConformationManganeseNADPFlavinsTemperatureArginineAlkenesProtein Structure, QuaternaryCyclizationDimerizationFlavin-Adenine DinucleotideDiethyl PyrocarbonateCrystallizationIminesNADAsparaginePhosphatesCircular DichroismChemistry, OrganicLewis AcidsElectron Spin Resonance SpectroscopyHemePalladiumMagnetic Resonance SpectroscopyZincEscherichia coli ProteinsOxygen