Restoration of sensitivity to ADM by diamide. Viable cells were estimated by MTT assays after incubation with different doses of ADM in the presence or absence of diamide (100 μg/mL) for 3 days. Representative results were obtained from 3 different experiments that showed similar results. The mean ± SD for the IC₅₀ obtained from 3 different experiments is shown in Table 4. (A) ATL-2, (B) ATL-2/ADM cl-2, (C) Jurkat.