UrineAmino AcidsSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularAmino Acids, EssentialAmino Acid Transport SystemsSequence AlignmentBase SequenceAmino Acid MotifsEscherichia coliMutationBinding SitesMutagenesis, Site-DirectedMolecular Sequence DataDNA, ComplementaryAmino Acids, AromaticSequence Homology, Nucleic AcidAmino Acids, Branched-ChainKineticsPeptide FragmentsAmino Acids, SulfurRecombinant ProteinsLeucineProtein ConformationModels, MolecularChromatography, High Pressure LiquidStructure-Activity RelationshipProtein Structure, TertiaryMolecular WeightPeptidesDNASubstrate SpecificityProtein BindingBacterial ProteinsRestriction MappingCell LinePhylogenySequence Analysis, DNAAlanineProteinsUrinalysisGenes, BacterialRecombinant Fusion ProteinsElectrophoresis, Polyacrylamide GelRNA, MessengerAmino Acid Transport Systems, BasicPlasmidsSpecies SpecificityProtein Structure, SecondaryIsoleucineConserved SequenceLysineAmino Acids, BasicDNA PrimersCarrier ProteinsCodonCattlePolymerase Chain ReactionGlycineBiological TransportNitrogenTrypsinCyanogen BromideGlutamineAmino Acids, DiaminoValineGenesOpen Reading FramesArginineMethionineProtein BiosynthesisExcitatory Amino AcidsAspartic AcidGene LibrarySequence AnalysisSequence DeletionSaccharomyces cerevisiaeProlinePhenylalaninePoint MutationMutagenesisTryptophanAmino Acid Transport System AAmino Acids, NeutralMembrane ProteinsCysteineMass SpectrometryDNA, BacterialTransfectionTranscription, GeneticKidneyLiverBlotting, NorthernGene ExpressionMacromolecular SubstancesEvolution, MolecularDietary ProteinsRabbits