Amino AcidsSubstance PSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularAmino Acids, EssentialAmino Acid Transport SystemsSequence AlignmentSubstance-Related DisordersBase SequenceAmino Acid MotifsEscherichia coliMutationBinding SitesMolecular Sequence DataMutagenesis, Site-DirectedDNA, ComplementaryKineticsPeptide FragmentsAmino Acids, AromaticSequence Homology, Nucleic AcidAmino Acids, Branched-ChainRecombinant ProteinsAmino Acids, SulfurLeucineProtein ConformationModels, MolecularStructure-Activity RelationshipPeptidesMolecular WeightProtein Structure, TertiaryDNASubstrate SpecificityProtein BindingBacterial ProteinsRestriction MappingCell LineReceptors, Neurokinin-1PhylogenyChromatography, High Pressure LiquidProteinsAlanineSubstance Abuse Treatment CentersSequence Analysis, DNARecombinant Fusion ProteinsRNA, MessengerGenes, BacterialElectrophoresis, Polyacrylamide GelPlasmidsSpecies SpecificityProtein Structure, SecondaryAmino Acid Transport Systems, BasicConserved SequenceLysineIsoleucineAmino Acids, BasicCarrier ProteinsCattleDNA PrimersBiological TransportCodonGlycineTrypsinCyanogen BromideArginineGlutamineGenesAmino Acids, DiaminoOpen Reading FramesValineMethionineProtein BiosynthesisPolymerase Chain ReactionNitrogenExcitatory Amino AcidsAspartic AcidSaccharomyces cerevisiaeGene LibraryProlineSequence DeletionSequence AnalysisPhenylalanineRabbitsPoint MutationMutagenesisCysteineTryptophanTransfectionMembrane ProteinsTranscription, GeneticAmino Acid Transport System AAmino Acids, NeutralThiobarbituric Acid Reactive SubstancesGene ExpressionDNA, BacterialMacromolecular SubstancesLiverSwineChromatography, Gel