Fig. 1.

Illustration of our first a priori on a synthetic GRN. The TF-TF edges (red edges) are less represented than the $\text{TF-}\overline{\text{TF}}$ edges (blue edges). The red nodes code for the TF genes while the green nodes code for $\overline{\text{TF}}$ genes. The ratio of the number of TF on the total number of genes is 5/18 in this example. The ratio of the number of TF-TF edges on the total number of edges is 2/20, which is about 2.5 times smaller