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Effects of K36 on UVA-induced nuclear factor erythroid 2–related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) expression in human epidermal keratinocytes. The representative image of the western blot (a) and the average value of the triplicate experiment (b); significant difference versus nonirradiated group: ##, p < 0.05; ###, p < 0.001; significant difference versus irradiated and nontreatment group: **, p < 0.01; ***, p < 0.001. The bars and error bars present as mean ± SD (n = 3).
