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Effect of cactus polysaccharides on apoptosis of lung cancer cells SK-MES-1 cells were treated with 0, 0.18 and 0.36 mg/ml of cactus polysaccharides for 24h. Then they were stained with annexin-V-FITC and propidium iodide and analyzed by flow cytometry. Lower left quadrant area indicated that the survival cells. The early and late apoptosis cells were presented by the lower right and upper right quadrants, respectively.
