Figure S5. Effect of oligomycin (oligom) on cellular sensitivity to taxol and As2O3 in HL-60 cells and HL-60-C6F cells. Cells were preincubated with 1 µg/ml oligomycin for 3 h, followed by treatment with 0.1 µM taxol or 1 µg/ml As2O3 for 24 h, as indicated. Apoptosis was assayed by flow cytometry analysis after double-staining with annexin-V and PI. Each bar represents data from three experiments (mean ± the SD).