A, HCT116 cells were treated with 100 nM Thapsigargin for 24 hrs. Cells were stained with dye recognizing cleaved Caspases 3 and 7 and imaged every 4 hours. Scale bar = 400 µm. B, Quantification of apoptotic populations as indicated by Cas3/7 fluorescence from A. Three independent experiments are represented as mean ± SEM, with significance calculated by Two-way ANOVA between conditions over time (f(3)=50.530, p<0.001); significant pairwise comparisons by Tukey's HSD post-hoc assessment are indicated by *. C 