Cloning, MolecularMutagenesisMutagenesis, Site-DirectedMolecular Sequence DataAmino Acid SequenceBase SequenceMutagenesis, InsertionalSequence Homology, Amino AcidEscherichia coliMutationDNA, ComplementarySequence AlignmentBinding SitesRecombinant ProteinsPlasmidsGenes, BacterialRestriction MappingModels, MolecularCloning, OrganismBacterial ProteinsDNA Transposable ElementsDNA PrimersDNAGene LibraryKineticsSequence Analysis, DNASequence Homology, Nucleic AcidAmino Acid SubstitutionStructure-Activity RelationshipProtein Structure, TertiaryDNA, BacterialSubstrate SpecificityCell LineProtein ConformationPolymerase Chain ReactionGenetic Complementation TestProtein BindingChromosome MappingRNA, MessengerGene ExpressionTransfectionConserved SequenceProtein Structure, SecondaryCysteineBlotting, SouthernTranscription, GeneticGenetic VectorsPoint MutationCatalysisBlotting, NorthernOpen Reading FramesRecombinant Fusion ProteinsGenesEthylnitrosoureaMutagensAlaninePromoter Regions, GeneticOligodeoxyribonucleotidesEscherichia coli ProteinsSaccharomyces cerevisiaeDNA Restriction EnzymesPhenotypeDNA Mutational AnalysisCrystallography, X-RayHistidineCatalytic DomainEnzyme StabilityCricetinaeCarrier ProteinsDNA, RecombinantCOS CellsGene Expression Regulation, BacterialSequence DeletionPhylogenyDNA-Binding ProteinsSOS Response (Genetics)Electrophoresis, Polyacrylamide GelNucleic Acid HybridizationTransformation, BacterialTransformation, GeneticOligonucleotide ProbesMultigene FamilyEthyl MethanesulfonateTranscription FactorsProtein EngineeringAmino Acid MotifsMembrane ProteinsOperonLysineUltraviolet RaysMolecular WeightGenomic LibraryDirected Molecular EvolutionCodonAspartic AcidGenes, FungalCHO CellsCosmidsGene Expression RegulationSequence Analysis