Figure 5
In- and out-degree distributions of the simulated TF binding data. (a) The arriving connectivity distribution (in-degree distribution). The number of genes regulated by 
TFs follows an exponential distribution of 
for in-degree . (b) The departing connectivity distribution (out-degree distribution). The number of TFs per follows the power-law distribution of 
for out-degree . Note that an exponential distribution is indicated by a linear relationship between 
and in a log-linear representation (a), whereas a distribution consistent with the power law is indicated by a linear dependence between and in a double logarithmic representation (b).