Amino Acids, Peptides, and ProteinsAmino AcidsAmino Acid SequenceMolecular Sequence DataAnhydridesSequence Homology, Amino AcidCloning, MolecularAmino Acid SubstitutionProteinsBase SequenceMutagenesis, Site-DirectedBinding SitesSequence AlignmentModels, MolecularEscherichia coliProtein ConformationMutationPeptide FragmentsStructure-Activity RelationshipRecombinant ProteinsProtein Structure, TertiaryKineticsProtein BindingAmino Acid MotifsDNA, ComplementarySubstrate SpecificityAmino Acids, EssentialSequence Homology, Nucleic AcidProtein Structure, SecondaryAmino Acid Transport SystemsPeptidesBacterial ProteinsDNAMolecular WeightRecombinant Fusion ProteinsRestriction MappingConserved SequenceCell LineElectrophoresis, Polyacrylamide GelAmino Acids, AromaticPlasmidsLeucineLysineGenes, BacterialAlanineChromatography, High Pressure LiquidTrypsinCyanogen BromideDNA PrimersCysteinePhylogenySequence Analysis, DNACattle