Fig. 2. Measurement of apoptosis in L1210 (A, B) and A20 cells (C, D) after DFX treatment with or without FeCl3, according to treatment time (24 vs. 48 hr) and DFX concentration (12.5-50 µM). Experiments were performed in triplicate. All data are presented as the mean±standard error (a)P<0.05, b)P<0.01).