Amino AcidsAmino Acid SequenceModels, MolecularSequence Homology, Amino AcidBinding SitesAmino Acid SubstitutionProtein ConformationMolecular Sequence DataProteinsMutagenesis, Site-DirectedProtein BindingSequence AlignmentProtein Structure, TertiarySequence Analysis, ProteinCloning, MolecularProtein Structure, SecondaryStructure-Activity RelationshipMutationKineticsCrystallography, X-RayHydrogen BondingDatabases, ProteinBase SequenceEscherichia coliCatalytic DomainCatalysisAmino Acid MotifsSolventsAmino Acids, EssentialPeptide FragmentsRecombinant ProteinsStatic ElectricityProtein FoldingAmino Acid Transport SystemsThermodynamicsModels, ChemicalSubstrate SpecificityMolecular StructureComputer SimulationSoftwarePeptidesDNA, ComplementarySequence Homology, Nucleic AcidBacterial ProteinsCysteineComputational BiologyAmino Acids, AromaticLysineCell LineConserved SequenceDNAAlanineLeucineMolecular WeightRecombinant Fusion ProteinsElectrophoresis, Polyacrylamide GelAmino Acids, Branched-ChainRestriction MappingAmino Acids, SulfurChromatography, High Pressure LiquidPlasmidsAspartic AcidTrypsinDNA PrimersMutagenesisArginineCattlePhylogenyPoint MutationGenes, BacterialTryptophanCyanogen BromideSequence Analysis, DNACarrier ProteinsHistidineRNA, MessengerAmino Acids, BasicSpecies SpecificityCircular DichroismIsoleucineGlycineMagnetic Resonance SpectroscopySerineSaccharomyces cerevisiaeSequence DeletionProlineMembrane ProteinsPhenylalanineTransfectionCodonGlutamineHydrolysisBiological TransportHydrogen-Ion ConcentrationThreonineTyrosineMethionineMacromolecular SubstancesSequence AnalysisAmino Acid Transport Systems, Basic