Fig. 4

TUNEL staining (green) of tumor and organs of control (A, D, G, J, M, P), single dose (B, E, H, K, N, R, Q) and fractionated dose group (C, F, I, L, O, R). Nuclei were counterstained with DAPI (blue). The staining solution without enzyme served as negative control (S–U). Scale bar: 100 µm