MutagenesisMutagenesis, Site-DirectedMutagenesis, InsertionalMolecular Sequence DataAmino Acid SequenceMutationBase SequenceBinding SitesModels, MolecularEscherichia coliAmino Acid SubstitutionStructure-Activity RelationshipSequence Homology, Amino AcidDNA Transposable ElementsRecombinant ProteinsPlasmidsProtein Structure, TertiaryCloning, MolecularBacterial ProteinsKineticsProtein ConformationProtein BindingCysteineProtein Structure, SecondarySequence AlignmentGenes, BacterialPoint MutationMutagensEthylnitrosoureaSubstrate SpecificityCatalysisAlanineDNA PrimersCell LineSOS Response (Genetics)HistidineConserved SequenceDNA Mutational AnalysisCatalytic DomainEscherichia coli ProteinsCrystallography, X-RayGenetic Complementation TestTransfectionRestriction MappingEthyl MethanesulfonateDNA, BacterialSequence DeletionRecombinant Fusion ProteinsProtein EngineeringOligodeoxyribonucleotidesLysinePhenotypeDirected Molecular EvolutionAspartic AcidDNAAmino Acid MotifsEnzyme StabilityMutant ProteinsPromoter Regions, GeneticUltraviolet RaysSaccharomyces cerevisiaeTranscription, GeneticAsparagineCricetinaeGene Expression Regulation, BacterialGenetic VectorsDNA-Binding ProteinsSerineCOS CellsPolymerase Chain ReactionDNA RepairDNA-Directed DNA PolymeraseArginineCircular DichroismTranscription FactorsSequence Analysis, DNADimerizationLigandsTryptophanGene DeletionCHO CellsCercopithecus aethiopsCodonElectrophoresis, Polyacrylamide GelMutagenicity TestsAmino AcidsOperonHydrogen-Ion ConcentrationGlycosylationGene LibraryMembrane ProteinsRecombination, GeneticCarrier ProteinsDNA DamageTransformation, BacterialHydrolysisTransformation, GeneticMethylnitronitrosoguanidineGenetic EngineeringHydrogen Bonding