Amino AcidsSequence Homology, Amino AcidSingle-Chain AntibodiesImmunoglobulin FragmentsAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularAmino Acids, EssentialAmino Acid Transport SystemsImmunoglobulin Variable RegionSequence AlignmentBase SequenceEscherichia coliMolecular Sequence DataPeptide LibraryAmino Acid MotifsRecombinant ProteinsMutationBinding SitesMutagenesis, Site-DirectedRecombinant Fusion ProteinsDNA, ComplementaryKineticsModels, MolecularPeptide FragmentsAmino Acids, AromaticProtein ConformationSequence Homology, Nucleic AcidAmino Acids, Branched-ChainAmino Acids, SulfurProtein Structure, TertiaryProtein BindingLeucineStructure-Activity RelationshipPeptidesDNAMolecular WeightAntibody AffinityCell LineBacterial ProteinsSubstrate SpecificityRestriction MappingSequence Analysis, DNAElectrophoresis, Polyacrylamide GelPhylogenyPlasmidsDNA PrimersAlanineProtein EngineeringGenes, BacterialProteinsProtein Structure, SecondaryRNA, MessengerAmino Acid Transport Systems, BasicGene LibraryConserved SequenceIsoleucineChromatography, High Pressure LiquidAmino Acids, BasicLysineAntibodies, MonoclonalSpecies SpecificityCarrier ProteinsEpitopesCodonAntibody SpecificityPolymerase Chain ReactionCattleCyanogen BromideTrypsinGlycineBiological TransportTransfectionSaccharomyces cerevisiaeAmino Acids, DiaminoGlutamineOpen Reading FramesGenesMutagenesisValineProtein BiosynthesisProlineExcitatory Amino AcidsMethionineArgininePoint MutationGene ExpressionAspartic AcidSequence DeletionSequence AnalysisNitrogenCysteineMembrane ProteinsPhenylalanineAmino Acid Transport System AAmino Acids, NeutralTryptophanTranscription, GeneticMacromolecular SubstancesChromatography, Gel