Box plot of the gene set enrichment P values of the gene signatures of inorganic compounds derived from the CTD and the ENM molecular signature. The complete results are reported in Supplementary Table 2 . The results are presented per compound category, as described by the CTD annotation. The significance threshold is indicated with a red dashed line. As the P value is expressed as minus logarithm, the significance threshold of 0.05 has been drawn at 2.995732. Individual data points are reported as black dots. The data are presented as mean values (red dots) standard error of independent experiments ( n = 1, 1, 1, 1, 2, 12, 1, 3, 3, 5, 2, 3 for each bar, respectively).