Caspase 3 expression is not deficient in HL60 and M14 cells.

Caspase 3 activity was measured (as described above) in lysates prepared from 2 × 106 cells from each cell line after incubation for 8 hours with etoposide (40 μmol/L) or staurosporine (0.5 μmol/L) in the presence or absence of caspase 3-specific inhibitor DEVD-CH) (1 μmol/L). Data are shown as fold increase (x increase) in activity over the untreated cells and are representative of at least 3 independent experiments.