Figure 4

Analysis of mitochondrial membrane potential in SW620 cells in different groups by flow cytometry. (A) Normal control group; (B) X-ray irradiation group; (C) Cu-Cy group (50 mg/L) (D) Cu-Cy-PDT (25 mg/L); (E) Cu-Cy-PDT (50 mg/L); (F) Cu-Cy-PDT (100 mg/L) *P < 0.05 compared with normal control group.