Figure 3
From: Preferential attachment in the evolution of metabolic networks
The connectivity of enzymes belonging to different phylogenetic groups. a) Average connectivity for enzymes in phylogenetic groups 1–5 in the metabolic network where the 15 most promiscuous compounds have been removed. b) The average Z-score (between 15–20 compounds removed from the network) is plotted for the phylogenetic groups 1–5.