Amino AcidsSequence Homology, Amino AcidAmino Acid SequenceCloning, MolecularAmino Acid SubstitutionMolecular Sequence DataSequence AlignmentBase SequenceAmino Acids, EssentialAmino Acid Transport SystemsPhylogenySequence Homology, Nucleic AcidEscherichia coliAmino Acid MotifsBinding SitesSequence Analysis, DNAMutationDNA, ComplementaryModels, MolecularProtein ConformationMutagenesis, Site-DirectedRecombinant ProteinsKineticsBacterial ProteinsPeptide FragmentsProtein Structure, TertiaryAmino Acids, AromaticRestriction MappingStructure-Activity RelationshipAmino Acids, Branched-ChainGenes, BacterialDNASubstrate SpecificitySpecies SpecificityAmino Acids, SulfurProtein BindingLeucineMolecular WeightDNA, BacterialProteinsPeptidesConserved SequenceCell LineProtein Structure, SecondaryRNA, MessengerRecombinant Fusion ProteinsElectrophoresis, Polyacrylamide GelPlasmidsDNA PrimersAlanineCarrier ProteinsSequence Analysis, ProteinGene LibraryPolymerase Chain ReactionChromatography, High Pressure LiquidCattleAmino Acid Transport Systems, BasicSequence AnalysisLysineCodonSaccharomyces cerevisiaeEvolution, MolecularGenesIsoleucineAmino Acids, BasicTranscription, GeneticRNA, Ribosomal, 16SMultigene FamilyBiological TransportTrypsinCyanogen BromideProtein BiosynthesisMembrane ProteinsGlycineSequence DeletionPlant ProteinsGene ExpressionBlotting, NorthernMutagenesisGlutamineBase CompositionDNA, RibosomalAmino Acids, DiaminoArginineOpen Reading FramesMethionineValineNitrogenAspartic AcidPoint MutationTransfectionViral ProteinsCysteinePhenotypeExcitatory Amino AcidsProlineSequence HomologyMacromolecular SubstancesGenetic Complementation TestPhenylalanine