Amino Acids, EssentialAmino AcidsAmino Acid SequenceSequence Homology, Amino AcidProteinsModels, MolecularProtein ConformationProtein Structure, SecondaryMolecular Sequence DataProtein Structure, TertiarySequence AlignmentSequence Analysis, ProteinDatabases, ProteinStructural Homology, ProteinCloning, MolecularBase SequenceAmino Acid SubstitutionProtein FoldingBinding SitesSoftwareAlgorithmsComputational BiologyLeucineAmino Acid Transport SystemsEscherichia coliStructure-Activity RelationshipMutationProtein BindingAmino Acid MotifsMutagenesis, Site-DirectedDietary ProteinsKineticsNitrogenModels, ChemicalSequence Homology, Nucleic AcidConserved SequenceIsoleucineRecombinant ProteinsComputer SimulationBacterial ProteinsLysineTryptophanPhenylalanineAmino Acids, AromaticEvolution, MolecularPeptide FragmentsInternetCrystallography, X-RayPhylogenyMethioninePeptidesSubstrate SpecificityKeto AcidsAmino Acids, Branched-ChainDNA, ComplementaryBuchneraDNANutritional RequirementsSequence Analysis, DNACattleGlutamineCell LineNuclear Magnetic Resonance, BiomolecularRNA, MessengerThermodynamicsThreonineMolecular WeightCysteineArginineMembrane ProteinsProtein BiosynthesisRestriction MappingGenes, BacterialUser-Computer InterfaceHydrogen BondingElectrophoresis, Polyacrylamide GelRecombinant Fusion ProteinsAlanineValineDNA PrimersChromatography, High Pressure LiquidSpecies SpecificityNucleic Acid ConformationProlineCircular DichroismPlasmidsHydrophobic and Hydrophilic InteractionsMolecular StructureCarrier ProteinsMagnetic Resonance SpectroscopyTrypsinHistidinolAmino Acids, SulfurAspartic AcidCaseinsSequence AnalysisComputer GraphicsHistidineUreaGenes