Fig. 5.

The expression of γH2AX in a cell cycle-dependent manner in Hela, HepG2 and MEC-1 cells. The three cell lines are exposed to 0.5, 1, 2 and 4 Gy ¹²C⁶⁺ irradiation and then incubated for 0.5, 4 and 24 h in vitro. a, b, c Hela cells; d, e, f HepG2 cells; g, h, i MEC-1cells; a, d G-0.5 h; b, e, h 4 h; c, f, i 24 h. *P < 0.05, **P < 0.01 vs Control. Results are the means and SD for the three experiments