OperonrRNA OperonGene Expression Regulation, BacterialLac OperonGenes, BacterialBacterial ProteinsEscherichia coliMolecular Sequence DataBase SequenceTranscription, GeneticDNA, BacterialEscherichia coli ProteinsRNA, BacterialBacillus subtilisPromoter Regions, GeneticGenes, RegulatorAmino Acid SequenceCloning, MolecularMutationRestriction MappingGenetic Complementation TestRepressor ProteinsMutagenesis, InsertionalSequence Analysis, DNAbeta-GalactosidaseSalmonella typhimuriumChromosomes, BacterialMultigene FamilyDNA Transposable ElementsChromosome MappingOpen Reading FramesRegulonGenome, BacterialEnzyme RepressionSigma FactorGenesSequence Homology, Amino AcidArtificial Gene FusionSequence Homology, Nucleic AcidTerminator Regions, GeneticOperator Regions, GeneticArabinosePseudomonas putidaTryptophanaseTranscription FactorsGene DeletionDNA-Binding ProteinsGene OrderVirulenceTryptophanLeucine-Responsive Regulatory ProteinDNA-Directed RNA PolymerasesNucleic Acid ConformationSequence AlignmentDNA Restriction EnzymesAnaerobiosisEscherichia coli K12Lactose