Figure 2

Effects of saikosaponin-d and radiation on apoptosis in hepatocellular carcinoma cell SMMC-7721. A. Flow cytometry shows apoptotic changes before and after treatment under oxia and hypoxia; B. Apoptotic fraction of cells under oxia and hypoxia; SSd: saikosaponin-d; IR: radiation. *p < 0.05, **p < 0.01 vs. control.