Network properties.

Properties of the substrate graphs of artificially generated networks as well as of examples of real networks. Table contains the number of vertices (∣V∣) and edges (∣E∣), the mean shortest path length (L >) and the clustering coefficient (C >) of the respective undirected network. The modularity is calculated using the walktrap community finding algorithm [38]. Data for real networks is taken from a database for Earth’s photochemical reactions [22], models for the combustion of Ethanol [23] and Dimethyl ether [24] and a kinetic model of Yeast’s metabolism [25]. For the artificial networks and the randomizations of the real networks mean values and standard deviations are calculated from 10 samples.