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The effect of ziyuglycoside II on cell cycle distribution and apoptosis of MDA-MB-435 cells. Cells were incubated with various concentrations of ziyuglycoside II for 24 h, cell cycle distribution (A) and apoptosis (B) were assessed by flow cytometric analysis as described in Materials and Methods. All data were expressed as mean ± SD of three experiments and each experiment included triplicate repeats. * p < 0.05, ** p < 0.01 vs. control.
