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Effect of curcumin on the expression of cytochrome P450 (CYP)1A1 and CYP1B1 in liver and stomach of rats treated with benzo[a]pyrene (BaP). Rats were orally administrated BaP alone (20 mg/kg) or in combination with curcumin (50, 100, or 200 mg/kg) for 30 days. The control group was administered vehicle only. Representative bands of western blot for CYP1A1 and CYP1B1 were shown. β-Actin was used as endogenous control to normalize the data.
