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The expression levels of HO-1 and NQO1 were determined at ZT0 and at ZT12 by western blotting and normalized by that of β-actin. The intensity of each band was quantified by ImageJ 1.44. The results are represented as the mean ± SE (n = 6–8). Asterisks indicate a significant difference from the control by Dunnett’s test (p < 0.05).
