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IU1 blocks G0/G1 to S phase transition in cervical cancer cells. (A-B) Shown are representative histograms of PI staining of HeLa and SiHa cells. Fluorescence activated cell sorting analysis were performed on HeLa and SiHa cells which exposed to the indicated concentrations of IU1 for 12 h. (C-D) The percentage of cells in each population as well as in each cell cycle phase at 12 h was calculated. *p<0.05, **p<0.01 compared with DMSO treatment.
