Figure 4

Using the distance to the TSS to distinguish between TF binding site classes. Binding sites that were functionally verified or not (a) and between activating and repressing TFBSs (b). Here, P_|N| = P_-N+ P _N is the probability of finding a validated TFBS within |N| base pairs of the transcription start site (inset). The cumulative probability, ${\mathbb{P}}_M={\sum }_{N=0}^M{P}_{\left|N\right|}$, is plotted in the main panels.