Fig. 4.
Activation of procaspase-3 in etoposide-treated leukemic cells. Western blot analysis of procaspase-2L (the 45-kD long isoform of ICH-1), procaspase-3 (the 32 kD proenzyme CPP32/Yama/Apopain) and active caspase-3 fragments (p19 and p17) in cell lines treated for indicated times with 100 μmol/L etoposide.