Amino Acids, Peptides, and ProteinsAmino AcidsAmino Acid SequenceMolecular Sequence DataAnhydridesPeptidesProtein BindingModels, MolecularProteinsBinding SitesProtein ConformationProtein Structure, TertiaryProtein Interaction MappingSequence Homology, Amino AcidAmino Acid SubstitutionTwo-Hybrid System TechniquesBase SequencePeptide FragmentsMutagenesis, Site-DirectedSequence AlignmentProtein Structure, SecondaryStructure-Activity RelationshipCell LineKineticsCloning, MolecularSequence Analysis, ProteinMutationCrystallography, X-RayHydrogen BondingTranscription FactorsDatabases, ProteinEscherichia coliPeptide Library