HistidineHistidine DecarboxylaseDiethyl PyrocarbonateGuanidineHistidine Ammonia-LyaseTrimethylsilyl CompoundsHydrogen-Ion ConcentrationGuanidinesAmino Acid SequenceMolecular Sequence DataBinding SitesKineticsProtein DenaturationAmino AcidsProtein ConformationMutagenesis, Site-DirectedTabletsModels, MolecularATP PhosphoribosyltransferaseHistidinolBacterial ProteinsUrocanate HydrataseProtein KinasesEscherichia coliCircular DichroismMutationSpectrophotometry, UltravioletChemistry, PharmaceuticalAcid Anhydride HydrolasesZincDrug StabilityMagnetic Resonance SpectroscopyDose-Response Relationship, DrugTiloroneDosage FormsProtein BindingSequence Homology, Amino AcidHistamineHydroxylamineCatalysisBase SequenceRecombinant ProteinsPeptide PHIFood AdditivesFormiminoglutamic AcidPhenethylaminesChromatography, High Pressure LiquidDelayed-Action PreparationsStructure-Activity RelationshipUreaRimantadineMeat-Packing IndustrySpectrometry, FluorescenceAmantadineProtein Structure, TertiaryHemeCarnosineNimustineCysteineSolubilityProtein FoldingTiapamil HydrochlorideMethylhistidinesOxidation-ReductionCrystallography, X-RayCopperDibenzazepinesPharmaceutical SolutionsSpectrophotometryHistamine H1 AntagonistsCattleTemperatureAmino Acid SubstitutionExcipientsProtein Structure, SecondaryTryptophanFormatesDiethylaminesCloning, MolecularDrug CompoundingHydroxylaminesRNA, Transfer, HisThermodynamicsSalmonella typhimuriumPseudoephedrineAspartic AcidImidazolesArginineTime FactorsWhalesMolecular StructureOperonProtonsMyoglobinDibenzoxepinsHemeproteinsGene Expression Regulation, BacterialSequence AlignmentPolyaminesCapsules