Table 1. Some Properties of the Reaction Networks^a.

	indole		indole-a
	Level1	Level2	Level1	Level2
nodes	909	863	398	258
edges	2178	1846	1416	700
average shortest path length	3.8 (4.6)	4.1 (5.0)	3.0 (3.3)	3.4 (3.5)
average clustering coefficient	0.17 (0.005)	0.13 (0.005)	0.23 (0.018)	0.15 (0.021)

^aNumbers in parentheses refer to the corresponding values for a random (Erdös–Rényi) network with the same number of nodes and edges.