Amino AcidsAmino Acid SequenceAmino Acid SubstitutionMolecular Sequence DataSequence Homology, Amino AcidMutagenesis, Site-DirectedBase SequenceMutationCloning, MolecularStructure-Activity RelationshipModels, MolecularSequence AlignmentEscherichia coliBinding SitesCodonProtein ConformationKineticsPeptidesLeucineSubstrate SpecificityProtein Structure, TertiaryProtein Structure, SecondaryGlycineProtein BindingHistidineValineProteinsLysineBacterial ProteinsPoint MutationRecombinant ProteinsAlanineCell LinePeptide FragmentsPhylogenySequence Analysis, DNAMolecular WeightProlineCattleDNA Mutational AnalysisConserved SequenceDNACarrier ProteinsSequence Analysis, ProteinSpecies SpecificityMutation, MissenseAmino Acids, EssentialMacromolecular SubstancesEvolution, MolecularSaccharomyces cerevisiaeOligopeptidesAmino Acid Transport SystemsPlasmidsElectrophoresis, Polyacrylamide GelTemperatureViral ProteinsPolymerase Chain ReactionGenetic VariationTranscription, GeneticAmino Acid MotifsHydrogen-Ion ConcentrationPhenotypeThermodynamicsAllelesPhenylalanineDNA, ComplementaryAmino Acids, AromaticSequence Homology, Nucleic AcidAmino Acids, Branched-ChainAmino Acids, SulfurModels, BiologicalRNA, MessengerMembrane ProteinsRestriction MappingRecombinant Fusion ProteinsGenes, BacterialAmino Acid Transport Systems, BasicIsoleucineAmino Acids, BasicChromatography, High Pressure LiquidDNA PrimersCyanogen BromideTrypsinBiological TransportAmino Acids, DiaminoGlutamineOpen Reading FramesGenesProtein BiosynthesisExcitatory Amino AcidsMethionineArginineAspartic AcidGene LibrarySequence DeletionSequence AnalysisNitrogenMutagenesisAmino Acid Transport System AAmino Acids, Neutral