Fig. 6. Caspase 9-like activity in soybean cells treated with CPA. White bar, untreated cells; grey bar, cells treated for 24 hours with 50 µM CPA; black bar, cells treated for 24 hours with 50 µM CPA in the presence of the caspase 9 inhibitor Ac-LEHD-CHO (20 µM). Caspase 9-like activity in untreated cells was taken as 100%. Data are means±s.d. of three independent experiments. Statistically significant at **P<0.005.