C PARP inhibitor mainly affected BGL3 recruitment at an early time point. U2OS cells were treated with DMSO or olaparib, and BGL3 recruitment was examined following laser micro-irradiation at indicated time point. Data presented are the average of three independent experiments, and 100 cells were counted for each experiment. Two-tailed Student's t test, **P < 0.01, N: no significant difference. 