CatalysisKineticsModels, MolecularModels, ChemicalBiocatalysisBinding SitesCatalytic DomainSubstrate SpecificityMolecular Sequence DataCrystallography, X-RayAmino Acid SequenceProtein ConformationMutagenesis, Site-DirectedMolecular StructureEscherichia coliChemical PhenomenaMagnetic Resonance SpectroscopyStructure-Activity RelationshipHydrolysisProtein BindingOxidation-ReductionProtein Structure, TertiaryHistidineRNA, CatalyticStereoisomerismMultiple Chemical SensitivityBase SequenceRecombinant ProteinsHydrogen-Ion ConcentrationMutationChemical IndustryHydrogen Bonding