FIG. 6.
Binding of OxyR to the katB, ahpB, and ahpC promoters. The alignment of the OxyR-regulated promoters indicates four putative OxyR-binding tetranucleotide sequences (underlined), the residues matching the consensus sequence derived from E. coli OxyR-regulated promoters (asterisks), and the −35 promoter elements in proper distance of the mapped transcriptional start sites. The gel mobility shift assays of radiolabeled DNA fragments containing the corresponding promoter regions were performed with purified His6-tagged OxyR protein at the given concentrations.