Amino AcidsAmino Acids, AromaticHydrocarbons, AromaticSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularAmino Acids, EssentialAmino Acid Transport SystemsSequence AlignmentMolecular Sequence DataBase SequenceEscherichia coliBinding SitesAmino Acid MotifsMutationModels, MolecularKineticsMutagenesis, Site-DirectedProtein ConformationStructure-Activity RelationshipPolycyclic CompoundsSubstrate SpecificityRecombinant ProteinsAmino Acids, Branched-ChainPhenylalanineDNA, ComplementarySequence Homology, Nucleic AcidPeptide FragmentsProtein Structure, TertiaryLeucineProtein BindingAmino Acids, SulfurBacterial ProteinsDNAPeptidesMolecular WeightTryptophanPhylogenyProtein Structure, SecondaryGenes, BacterialRestriction MappingSequence Analysis, DNAChromatography, High Pressure LiquidCell LineAlanineProteinsRecombinant Fusion ProteinsElectrophoresis, Polyacrylamide GelConserved SequenceRNA, MessengerSpecies SpecificityLysineDNA PrimersIsoleucineBiodegradation, EnvironmentalAmino Acid Transport Systems, BasicMolecular StructureCarrier ProteinsMagnetic Resonance SpectroscopyPlasmidsPyrenesCattleAmino Acids, BasicBiological TransportGlycineCodonCatalysisTyrosineOpen Reading FramesTrypsinMutagenesisArginineGenesGlutamineCyanogen BromideValineSaccharomyces cerevisiaePolymerase Chain ReactionNitrogenDNA, BacterialMethioninePoint MutationAspartic AcidStereoisomerismAmino Acids, DiaminoAminesSequence AnalysisProtein BiosynthesisProlineGene LibrarySequence DeletionCysteineHydrocarbonsExcitatory Amino AcidsTranscription, GeneticBenzo(a)pyreneMembrane ProteinsTransfectionCrystallography, X-Ray