Fig. 3
From: Testing biological network motif significance with exponential random graph models
Degree distributions of the networks. Power law and log-normal distributions fitted to the CDF for degree distributions of the networks (in- and out-degree for directed networks, degree for undirected networks). All distributions apart from the E. coli in-degree distribution (for which a log-normal distribution could not be fitted), and the Human PPI (HIPPIE) degree distribution (which is not consistent with a power law distribution, \(p < 0.01\)), are consistent with both power law and log-normal distributions