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(a) Flow cytometry analysis to detect the apoptotic effect of tetrandrine (TET) on PC-3 cells. After treatment with TET for 48 h, cells were harvested and stained with annexin-V/propidium iodide (PI) followed by FACS analysis as described in the Materials and methods. (b) PC-3 stained with annexin V/PI after treatment with various concentrations of TET for 48 h. Data represent mean ± s.d.; s.d.: standard deviation.
