Effects in gel mobility shift assays of different DNA-binding drugs on Pro11 binding to the DNA fragment orf11F3R2 (Fig. 2A). (A) Chromomycin A3. Lanes: 2 to 8, 0.5, 1, 2.5, 5, 12.5, 50, and 75 μM, respectively. (B) Methyl-green. Lanes 2 to 8, 1, 2, 5, 10, 25, 50, 100, and 125 μM, respectively. (A and B) Lanes 1, no drug; lanes 9, free probe (no protein or drug added).