715603.fig.001a
(a)
715603.fig.001b
(b)
Figure 1: Caspase 8 (a) and 9 (b) activities were determined using luminescent kits as described in the method for SK-MEL-28 cell line treated with xanthones for 48 h. The values are shown as the mean ± SEM ( ). Treatments significantly different from the untreated control at are presented as * and at as **.