Fig. 4

ROC-curves for different values of STRING score for networks of size > 10 and ≤ 50 (a) and for networks of size = 10 (b). In all variants, as a negative control, all genes with at least one bond in the global network with a score above 400 were taken. Edgeless networks correspond to the linear sections of the ROC curve. Linear segments are due to a fairly large proportion of edgeless networks with the same p-values in positive and negative controls