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Effect of nicotine (NCT) on mRNA level of p53; (A) the mRNA levels of p53 and GAPDH were evaluated by using semi-quantitative RT-PCR. (B) Represents the density of p53 mRNA levels in testicular tissue that were measured by densitometry and normalized to GAPDH mRNA expression level. Results are expressed as integrate intensity value (IDV) of p53 mRNA level, * versus **, (P<0.001)
