Figure 1.

Plot of the modularity and a dendrogram for enzymatic genes in the yeast metabolic network. (a) A plot of the modularity against the number of branches. The peak (red line) in the modularity was used to identify the communities. (b) A dendrogam for enzymatic genes in the network constructed on the basis of the Q statistic. The numbers on the right of the dendrogram denote the number of nodes linked by each tip.