Amino AcidsSequence Homology, Amino AcidAmino Acid SequenceAmino Acid SubstitutionCloning, MolecularChromatography, AffinityBinding SitesMolecular Sequence DataKineticsProtein BindingBase SequenceAmino Acid Transport SystemsAmino Acids, EssentialSequence AlignmentMutationEscherichia coliModels, MolecularRecombinant ProteinsMutagenesis, Site-DirectedProtein ConformationAmino Acid MotifsStructure-Activity RelationshipPeptide FragmentsProtein Structure, TertiarySubstrate SpecificityMolecular WeightDNA, ComplementaryPeptidesCell LineAffinity LabelsDNAAntibody AffinitySequence Homology, Nucleic AcidElectrophoresis, Polyacrylamide GelNeutral RedLeucineAmino Acids, AromaticBacterial ProteinsHydrogen-Ion ConcentrationAmino Acids, Branched-ChainRecombinant Fusion ProteinsBinding, CompetitiveCarrier ProteinsAmino Acids, SulfurAlanineProtein Structure, SecondaryCattleProteinsAmino Acids, NeutralChromatography, High Pressure LiquidPhylogenyRestriction MappingBiological TransportNeutral CeramidaseSpecies SpecificityRNA, MessengerSequence Analysis, DNAPlasmidsDNA PrimersLysineConserved SequenceAmino Acid Transport Systems, BasicLigandsGenes, BacterialCell MembraneTrypsinRabbitsIsoleucineChromatography, GelTransfectionMacromolecular SubstancesMembrane ProteinsGlycineSaccharomyces cerevisiaeHydrolysisCricetinaePoint MutationArginineMutagenesisAspartic AcidTryptophanCysteinePhenylalanineAmino Acids, BasicCodonGlutamineCyanogen BromidePolymerase Chain ReactionAmino Acids, DiaminoTemperatureChromatography, Ion ExchangeEvolution, MolecularSequence DeletionProtein BiosynthesisCircular DichroismProlineValineMethionineGenesGene Library