Fig. 5

NQO1 is not changed at 3, 6 h after UVA irradiation. NQO1 expression level in NB1-RGB cells was evaluated using western blotting at each time point after initiating UVA irradiation (a) 3, (b) 6 h. At all time points, WEP was applied at a concentration of 30 μg/mL. Mean ± SEM (n = 5–6), NS means P > 0.05 vs. control (Tukey’s test)