Fig. 2From: Potential effect of tobacco cigarettes smoking on global DNA methylation status and protamines transcripts in human spermatozoaTranscription level of protamine genes (1 and 2) in heavy smokers compared to non-smokers. P > 0.05: not significant; P < 0.05: significant. Ct levels are inversely proportional to the amount of target RNA in the sampleBack to article page