DNA FootprintingBase SequencePromoter Regions, GeneticMolecular Sequence DataDeoxyribonuclease IProtein FootprintingDNA-Binding ProteinsBinding SitesTranscription, GeneticGene Expression Regulation, BacterialTranscription FactorsDNAProtein BindingNucleotide MappingElectrophoretic Mobility Shift AssayRegulatory Sequences, Nucleic AcidBacterial ProteinsRepressor ProteinsTrans-ActivatorsNuclear ProteinsEnhancer Elements, GeneticGene Expression RegulationSulfuric Acid EstersOperonDNA, BacterialEscherichia coliHydroxyl RadicalEscherichia coli ProteinsPlasmidsHeLa CellsCell LineCloning, MolecularMutationNucleic Acid ConformationDistamycinsPotassium PermanganateEchinomycinHydroxidesSp1 Transcription FactorOligodeoxyribonucleotidesOperator Regions, Genetic