(a)
(b)
(c)
(d)
(e)
Figure 4: Biochemical estimations of both cells. (a) MDA level; (b) T-AOC activity; (c) SOD activity; (d) GSH-PX activity; (e) CAT activity. Cells were pretreated with protein or amifostine and irradiated with 4 Gy X-ray subsequently. After irradiation, the cells were further cultured for 24 h at 37°C. Then, the cells were lysed and centrifuged, and the antioxidant activities in the supernatant were determined subsequently. The bars indicate the means ± SD (). The XRT group was compared with the control group (, ). The pretreated group was compared with the XRT group (, ).