Amino AcidsKineticsTryptophanDihydroxyphenylalanineSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularAmino Acids, EssentialAmino Acid Transport SystemsBrainBase SequenceSequence AlignmentMutationMolecular Sequence DataEscherichia coliBinding SitesAmino Acid MotifsMutagenesis, Site-DirectedProtein ConformationModels, MolecularRecombinant ProteinsLeucineDNA, ComplementarySubstrate SpecificityProtein BindingPeptide FragmentsNeutral RedAmino Acids, AromaticSequence Homology, Nucleic AcidStructure-Activity RelationshipHydrogen-Ion ConcentrationAmino Acids, Branched-ChainDNAProtein Structure, TertiaryMolecular WeightCell LineAmino Acids, SulfurPeptidesBacterial ProteinsAmino Acids, NeutralNeutral CeramidaseAlanineElectrophoresis, Polyacrylamide GelProteinsPhylogenyChromatography, High Pressure LiquidRestriction MappingBiological TransportCattleRecombinant Fusion ProteinsRNA, MessengerProtein Structure, SecondarySequence Analysis, DNASpecies SpecificityAmino Acid Transport Systems, BasicCarrier ProteinsGenes, BacterialPlasmidsLysineIsoleucineTemperatureDNA PrimersConserved SequenceGlycineTrypsinHydrolysisTime FactorsPhenylalanineCodonAmino Acids, BasicRabbitsGlutamineAmino Acids, DiaminoArginineSaccharomyces cerevisiaeModels, BiologicalNitrogenMethionineProtein BiosynthesisValineAspartic AcidGenesCell MembraneEvolution, MolecularTransfectionCyanogen BromideMembrane ProteinsCysteineProlinePolymerase Chain ReactionOpen Reading FramesPoint MutationMacromolecular SubstancesMutagenesisSequence DeletionTranscription, GeneticAmino Acid Transport System ACatalysisChromatography, Gel