Figure 7. γH2AX immunostaining shows irradiation-induced γH2AX foci (arrows) in different brain regions including cortex (A), stratum granulosum of the dentate gyrus (B), stratum pyramidale of CA1 area of the hippocampus (C), striatum (D), thalamus (E), and olfactory bulb (F) at 15 months after irradiation at P21. Scan bar=50μm in (A) applies to (B–F).