Amino AcidsSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularAmino Acids, EssentialAmino Acid Transport SystemsSequence AlignmentBase SequenceEscherichia coliAmino Acid MotifsMutationMolecular Sequence DataBinding SitesMutagenesis, Site-DirectedDNA, ComplementarySequence Homology, Nucleic AcidKineticsAmino Acids, AromaticAmino Acids, Branched-ChainPeptide FragmentsRecombinant ProteinsAmino Acids, SulfurLeucineProtein ConformationModels, MolecularStructure-Activity RelationshipBacterial ProteinsProtein Structure, TertiarySubstrate SpecificityDNAMolecular WeightPhylogenyPeptidesProtein BindingSequence Analysis, DNARestriction MappingCell LineGenes, BacterialRecombinant Fusion ProteinsAlanineRNA, MessengerElectrophoresis, Polyacrylamide GelSpecies SpecificityPlasmidsProteinsNitrogenProtein Structure, SecondaryAmino Acid Transport Systems, BasicConserved SequenceChromatography, High Pressure LiquidCattleIsoleucineLysineDNA PrimersAmino Acids, BasicCarrier ProteinsCodonBiological TransportGlutamineGlycinePolymerase Chain ReactionTrypsinSaccharomyces cerevisiaeCyanogen BromideOpen Reading FramesGenesMethionineAmino Acids, DiaminoValineProtein BiosynthesisArginineGene LibraryDNA, BacterialAspartic AcidSequence AnalysisExcitatory Amino AcidsProlineSequence DeletionMutagenesisTranscription, GeneticPhenylalaninePoint MutationCysteineMembrane ProteinsTryptophanAmino Acid Transport System ATransfectionAmino Acids, NeutralEvolution, MolecularDietary ProteinsGene ExpressionSwineSequence Analysis, ProteinBlotting, NorthernMacromolecular SubstancesPlant ProteinsLiverViral ProteinsRabbits