Histograms of differential gene expression. Histograms of differential gene expression suggest the difficulty of the individual domains. An easy domain is supposed to have a strongly left-skewed histogram, while the difficult domains rather show a flat histogram. There is one plot for each of 30 domains, x axis shows the p-value of differential expression, the y axis gene frequency.
Holec et al. BMC Bioinformatics 2012 13(Suppl 10):S15 doi:10.1186/1471-2105-13-S10-S15