Amino 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-ChainPeptide FragmentsKineticsAmino Acids, SulfurProtein ConformationRecombinant ProteinsModels, MolecularLeucineProtein Structure, TertiaryStructure-Activity RelationshipProtein BindingDNASubstrate SpecificityPeptidesMolecular WeightBacterial ProteinsRestriction MappingPhylogenyCell LineSequence Analysis, DNARecombinant Fusion ProteinsProteinsAlanineGenes, BacterialRNA, MessengerElectrophoresis, Polyacrylamide GelProtein Structure, SecondaryPlasmidsConserved SequenceAmino Acid Transport Systems, BasicIsoleucineLysineSpecies SpecificityAmino Acids, BasicDNA PrimersCarrier ProteinsChromatography, High Pressure LiquidCodonBiological TransportCattleCyanogen BromideTrypsinGlycineOpen Reading FramesGenesGlutamineAmino Acids, DiaminoSaccharomyces cerevisiaeProtein BiosynthesisValineMethionineArginineExcitatory Amino AcidsPolymerase Chain ReactionSequence DeletionGene LibraryAspartic AcidSequence AnalysisNitrogenProlinePoint MutationMutagenesisPhenylalanineTranscription, GeneticMembrane ProteinsTransfectionAmino Acid Transport System ACysteineAmino Acids, NeutralTryptophanEvolution, MolecularSequence Analysis, ProteinDNA, BacterialMacromolecular SubstancesBlotting, NorthernGene ExpressionViral ProteinsPlant ProteinsThreonineRabbitsEpitopesDNA-Binding Proteins