Quantile-quantile plot of significance of difference in splice junction usage between smokers and nonsmokers. Normalized reads supporting splicing in the smokers and nonsmoker samples were compared. The data shows that smoking caused no significant difference in the splicing for either the ubiquitously expressed genes (blue) or SAE-enriched genes (green).
Hackett et al. BMC Genomics 2012 13:82 doi:10.1186/1471-2164-13-82