Amino AcidsSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularAmino Acid Transport SystemsAmino Acids, EssentialKineticsBiological TransportSequence AlignmentBase SequenceMutationMolecular Sequence DataEscherichia coliAmino Acid MotifsBinding SitesMutagenesis, Site-DirectedNeutral RedLeucineDNA, ComplementaryRecombinant ProteinsProtein ConformationPeptide FragmentsModels, MolecularSequence Homology, Nucleic AcidAmino Acids, AromaticAmino Acids, Branched-ChainHydrogen-Ion ConcentrationStructure-Activity RelationshipCell LineSubstrate SpecificityProtein BindingBacterial ProteinsAmino Acids, SulfurMolecular WeightDNAPeptidesProtein Structure, TertiaryAmino Acids, NeutralCarrier ProteinsAlanineNeutral CeramidasePhylogenyRNA, MessengerRestriction MappingElectrophoresis, Polyacrylamide GelChromatography, High Pressure LiquidAmino Acid Transport Systems, BasicSequence Analysis, DNAProteinsRecombinant Fusion ProteinsGenes, BacterialSpecies SpecificityCattlePlasmidsProtein Structure, SecondaryBiological Transport, ActiveGlucoseLysineCell MembraneIsoleucineDNA PrimersConserved SequenceGlycineGlutamineAmino Acids, DiaminoNitrogenMembrane ProteinsAmino Acids, BasicTissue DistributionMethionineLiverTrypsinProlineCodonRabbitsSaccharomyces cerevisiaeCells, CulturedAspartic AcidTransfectionPhenylalanineTemperatureAmino Acid Transport System AValineEvolution, MolecularTime FactorsAminoisobutyric AcidsGenesTryptophanOpen Reading FramesProtein BiosynthesisCyanogen BromideCysteinePolymerase Chain ReactionArginineHydrolysisMembrane Transport ProteinsSequence DeletionMutagenesisPoint Mutation