Figure 6: The effect of mesuagenin C 3 on the externalization of PS in NG108-15. (a) The different distribution of NG108-15 cells stained with annexin V-FITC/PI in a dual parametric dot plots of PI fluorescence ( -axis) versus annexin V-FITC fluorescence ( -axis). (b) Bar chart indicates the proportion of annexin V positive cells (annexin V+/PI and annexin V+/PI+) as compared to H2O2-treated cells. Values are mean ± S.E. from at least three independent experiments. The asterisk indicated significantly different values from H2O2-treated cells (* ).