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. 2008 Dec 24;2:111. doi: 10.1186/1752-0509-2-111

Figure 3.

Figure 3

Illustration of the six types of building blocks. The reaction directions are omitted in the figure for simplicity. The color legends are the same as in Figure 2. Two compound supernodes are considered similar if they share at least one common compound node. Two enzyme supernodes are considered similar if there exists a pair of enzymes which share the same first two digits in their EC numbers.