100 shortest CFPs in E. coli from Pyr to OAA in oxic conditions. Both the thickness of arcs and the size of metabolite nodes correspond to their frequency of appearance in the 100 shortest CFPs. Metabolites in grey are intermediates involved in the TCA cycle. See Additional file 3 for details.
Pey et al. Genome Biology 2011 12:R49 doi:10.1186/gb-2011-12-5-r49