Amino AcidsSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularMolecular Sequence DataAmino Acids, EssentialAmino Acid Transport SystemsBase SequenceSequence AlignmentMutationBinding SitesAmino Acid MotifsEscherichia coliKineticsMutagenesis, Site-DirectedDNA, ComplementaryRecombinant ProteinsModels, MolecularProtein ConformationProtein BindingPeptide FragmentsCell LineProtein Structure, TertiarySequence Homology, Nucleic AcidNeutral RedAmino Acids, AromaticStructure-Activity RelationshipLeucineRNA, MessengerSubstrate SpecificityDNAAmino Acids, Branched-ChainPeptidesMolecular WeightBacterial ProteinsAmino Acids, SulfurPhylogenyAmino Acids, NeutralProteinsSequence Analysis, DNAHydrogen-Ion ConcentrationRecombinant Fusion ProteinsNeutral CeramidaseElectrophoresis, Polyacrylamide GelCarrier ProteinsRestriction MappingAlanineDNA PrimersSpecies SpecificityProtein Structure, SecondaryChromatography, High Pressure LiquidPlasmidsGenes, BacterialConserved SequenceCattleBiological TransportAmino Acid Transport Systems, BasicLysineCells, CulturedTransfectionMembrane ProteinsIsoleucinePolymerase Chain ReactionGene ExpressionEvolution, MolecularTranscription, GeneticCodonAmino Acids, BasicTrypsinGlycineArginineSaccharomyces cerevisiaeGlutamineAmino Acids, DiaminoSequence DeletionProtein BiosynthesisOpen Reading FramesMutagenesisGenesCell MembraneSignal TransductionGene LibraryRabbitsAspartic AcidPoint MutationDNA-Binding ProteinsProlinePhenylalanineValineCyanogen BromideMethionineCysteineNitrogenTryptophanHydrolysisTime FactorsBlotting, NorthernAmino Acid Transport System AEndopeptidases