Gel mobility shift assays using a labeled DNA fragment containing the wblAch promoter region and the His6-AdpAch protein. Lane 1, labeled fragment; lanes 2 to 5, labeled fragment with 0.05 μg, 0.1 μg, 0.2 μg, and 0.4 μg of purified His6-AdpAch protein, respectively; lane 6, labeled fragment with a 100-fold excess of nonspecific DNA and 0.2 μg purified His6-AdpAch protein; lane 7, labeled fragment with a 100-fold excess of unlabeled wblAch promoter DNA and 0.2 μg purified His6-AdpAch protein.