Amino AcidsSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularMolecular Sequence DataAmino Acids, EssentialBase SequenceSequence AlignmentAmino Acid Transport SystemsAmino Acid MotifsMutationEscherichia coliBinding SitesDNA, ComplementarySequence Homology, Nucleic AcidMutagenesis, Site-DirectedRecombinant ProteinsPhylogenyModels, MolecularProtein Structure, TertiaryAmino Acids, AromaticKineticsProtein ConformationPeptide FragmentsProtein BindingAmino Acids, Branched-ChainAmino Acids, SulfurLeucineStructure-Activity RelationshipDNASequence Analysis, DNASubstrate SpecificityBacterial ProteinsCell LinePeptidesMolecular WeightRestriction MappingRNA, MessengerProteinsConserved SequenceGenes, BacterialCarrier ProteinsDNA PrimersElectrophoresis, Polyacrylamide GelProtein Structure, SecondarySpecies SpecificityPlasmidsAlanineRecombinant Fusion ProteinsMultigene FamilyAmino Acid Transport Systems, BasicLysineIsoleucineChromatography, High Pressure LiquidPolymerase Chain ReactionAmino Acids, BasicMembrane ProteinsOpen Reading FramesCattleCodonBiological TransportGene LibraryTranscription, GeneticTransfectionGenesDNA, BacterialSaccharomyces cerevisiaeTrypsinGlycineProtein BiosynthesisSequence DeletionCyanogen BromideSequence AnalysisAmino Acids, DiaminoGlutamineEvolution, MolecularGene ExpressionMutagenesisPoint MutationDNA-Binding ProteinsArginineValineMethionineBlotting, NorthernAspartic AcidExcitatory Amino AcidsProlineCysteineNitrogenTranscription FactorsPlant ProteinsPhenylalanineCOS CellsAmino Acid Transport System ATryptophanAmino Acids, NeutralViral ProteinsMacromolecular SubstancesSequence Analysis, Protein