(G) On day 21 in the experiments described in (F), apoptosis and UVRAG expression in tumour samples were assayed by TUNEL or western blotting, respectively (n=10, *P0.05). BAX, BCL2‐associated X protein; HBSS, Hank's Buffered Salt Solution; LC3, light chain 3; shRNA, short‐hairpin RNA; TUNEL, terminal deoxytransferase uridine triphosphate nick end labelling; UV, ultraviolet; UVRAG, ultraviolet irradiation resistance associated gene. 