HistidineHistidine DecarboxylaseDiethyl PyrocarbonateMagnetic Resonance SpectroscopyModels, MolecularProtein ConformationHistidine Ammonia-LyaseAmino Acid SequenceMolecular Sequence DataBinding SitesNuclear Magnetic Resonance, BiomolecularProtein Structure, SecondaryHydrogen BondingCrystallography, X-RayProteinsMolecular StructureThermodynamicsHydrogen-Ion ConcentrationPeptidesMutagenesis, Site-DirectedATP PhosphoribosyltransferaseHistidinolUrocanate HydrataseProtein KinasesAmino AcidsBacterial ProteinsSoftwareKineticsEscherichia coliAcid Anhydride HydrolasesMutationAlgorithmsZincPeptide PHIFormiminoglutamic AcidSequence Homology, Amino AcidBase SequenceHistamineCatalysisHemeCarnosineMethylhistidinesProtein BindingProtein Structure, TertiaryRecombinant ProteinsFormatesStructure-Activity RelationshipRNA, Transfer, HisHydroxylamineWhalesAmino Acid SubstitutionOperonProtonsCopperMyoglobinCysteineHemeproteinsSalmonella typhimuriumGene Expression Regulation, BacterialCloning, MolecularSequence AlignmentAspartic AcidRose BengalHistidine-tRNA LigaseCarboxy-LyasesCatalytic DomainOxidation-ReductionSubstrate SpecificityAmmonia-LyasesElectron Spin Resonance SpectroscopyHydroxylaminesSpectrum Analysis, RamanHistidinol-PhosphataseAlanineConserved SequenceSpectrophotometryLigandsArginineNickelEscherichia coli ProteinsCircular DichroismGenes, BacterialAmino Acid Transport Systems, BasicLysineTryptophanSpectrophotometry, UltravioletModels, ChemicalAmino Acids, EssentialNucleoside-Diphosphate KinaseFIGLU TestPhosphorylationCaulobacter crescentusPhosphoric Monoester HydrolasesSignal TransductionMutagenesisPeptide FragmentsPhotochemistryImidazolesPlasmidsAnserine