Amino AcidsAmino Acid SequenceSequence Homology, Amino AcidMolecular Sequence DataAmino Acid SubstitutionMutagenesis, Site-DirectedBinding SitesMutationSequence AlignmentModels, MolecularCloning, MolecularBase SequenceStructure-Activity RelationshipProtein Structure, TertiaryProtein ConformationAmino Acid Transport SystemsEscherichia coliProtein BindingAmino Acid MotifsSubstrate SpecificityRecombinant ProteinsPeptide FragmentsProtein Structure, SecondaryRecombinant Fusion ProteinsKineticsPhylogenyCell LineConserved SequenceLysineProlineLeucinePeptidesEvolution, MolecularAmino Acids, EssentialSpecies SpecificityAlaninePlasmidsDNA, ComplementaryPoint MutationProteinsIsoleucineBacterial ProteinsDNA PrimersDNACodonMutagenesisSequence Analysis, DNAArgininePhenylalanineMutant ProteinsGlutamineCOS CellsSaccharomyces cerevisiaeMethionineSequence DeletionCattleEpitopesTransfectionThreonineElectrophoresis, Polyacrylamide GelGlycineCarrier ProteinsMembrane ProteinsMolecular WeightDNA Mutational AnalysisCatalysisChromatography, High Pressure LiquidCell MembraneBiological TransportCysteineViral ProteinsSerineMacromolecular SubstancesGenetic VariationAmino Acids, AromaticSequence Homology, Nucleic AcidProtein BiosynthesisProtein Processing, Post-TranslationalAmino Acids, Branched-ChainEndopeptidasesHydrolysisRNA, MessengerAmino Acids, SulfurCircular DichroismHeLa CellsCricetinaeCytoplasmMutation, MissenseOligopeptidesTyrosineChickensDimerizationLigandsTranscription, GeneticHydrogen-Ion ConcentrationEscherichia coli ProteinsCercopithecus aethiopsDNA-Binding ProteinsPolymerase Chain ReactionMagnetic Resonance Spectroscopy