Amino AcidsSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularAmino Acids, EssentialAmino Acid Transport SystemsSequence AlignmentBase SequenceMolecular Sequence DataMutationKineticsEscherichia coliAmino Acid MotifsBinding SitesMutagenesis, Site-DirectedNeutral RedDNA, ComplementaryProtein ConformationSequence Homology, Nucleic AcidRecombinant ProteinsPeptide FragmentsAmino Acids, AromaticModels, MolecularLeucineAmino Acids, Branched-ChainStructure-Activity RelationshipSubstrate SpecificityMolecular WeightAmino Acids, SulfurDNAProtein Structure, TertiaryPeptidesProtein BindingAmino Acids, NeutralBacterial ProteinsCell LineHydrogen-Ion ConcentrationNeutral CeramidaseCattlePhylogenyRestriction MappingElectrophoresis, Polyacrylamide GelAlanineProteinsChromatography, High Pressure LiquidSequence Analysis, DNARNA, MessengerSpecies SpecificityAmino Acid Transport Systems, BasicGenes, BacterialRecombinant Fusion ProteinsProtein Structure, SecondaryPlasmidsCarrier ProteinsBiological TransportLysineConserved SequenceIsoleucineAbstracting and Indexing as TopicDNA PrimersAmino Acids, BasicTrypsinCodonGlycineGenesAmino Acids, DiaminoArginineSwineGlutamineNitrogenEvolution, MolecularCyanogen BromideRabbitsPhenylalanineMethionineValineAspartic AcidSaccharomyces cerevisiaeProtein BiosynthesisOpen Reading FramesPolymerase Chain ReactionAmino Acid Transport System ATryptophanProlineHydrolysisSequence AnalysisNeutral GlycosphingolipidsSequence DeletionCysteinePoint MutationNeprilysinTransfectionMembrane ProteinsChromatography, GelMutagenesisEndopeptidasesGene LibraryExcitatory Amino AcidsTime Factors