Figure 9.

Example flavonoid network split into four subnetworks. Simplified layout omitting commodity and currency metabolites, to show partitioning into 6 subnetworks by converting the two separator metabolites identified by Netsplitter from internal to external. Reactions are shown as arrows or small circles. Metabolites are shown as rectangles or ovals, colour coded as follows: white - external; yellow, green, blue, purple: subnetwork internals; red - separation nodes, light blue - orphan metabolite nodes. The reaction indicated by "X" is eliminated from the network because after conversion it only involves external metabolites. A fully labelled version of this figure is available in Additional File 5.