HistidineAmino AcidsSequence Homology, Amino AcidAmino Acid SequenceHistidine DecarboxylaseAmino Acid SubstitutionCloning, MolecularAmino Acids, EssentialDiethyl PyrocarbonateMolecular Sequence DataBinding SitesMutagenesis, Site-DirectedEscherichia coliAmino Acid Transport SystemsSequence AlignmentBase SequenceMutationKineticsHistidine Ammonia-LyaseModels, MolecularProtein ConformationAmino Acid MotifsBacterial ProteinsRecombinant ProteinsStructure-Activity RelationshipProtein Structure, TertiaryPeptide FragmentsProtein BindingDNA, ComplementarySequence Homology, Nucleic AcidAmino Acids, AromaticSubstrate SpecificityLeucineAmino Acids, Branched-ChainPeptidesHydrogen-Ion ConcentrationAmino Acids, SulfurAlanineMolecular WeightGenes, BacterialDNAProtein Structure, SecondaryRestriction MappingConserved SequenceAmino Acid Transport Systems, BasicRecombinant Fusion ProteinsLysineCell LinePlasmidsProteinsPhylogenyElectrophoresis, Polyacrylamide GelSequence Analysis, DNAAspartic AcidProtein KinasesCysteineDNA PrimersRNA, MessengerArginineSpecies SpecificityChromatography, High Pressure LiquidIsoleucineCatalysisCarrier ProteinsCattleTrypsinGlutamineAmino Acids, BasicTryptophanNitrogenCodonMutagenesisBiological TransportGlycineSaccharomyces cerevisiaePoint MutationMethionineGenesHistidinolCyanogen BromideMagnetic Resonance SpectroscopyValinePhenylalanineOpen Reading FramesMembrane ProteinsProlinePolymerase Chain ReactionSequence DeletionProtein BiosynthesisCrystallography, X-RayDNA, BacterialSequence AnalysisATP PhosphoribosyltransferaseTranscription, GeneticMacromolecular SubstancesGene LibraryZincEscherichia coli ProteinsGene Expression Regulation, BacterialTransfection