Fig. 2

Schematic representation of a catabolic (glycolysis) (from http://www.genome.jp/dbget-bin/www_bget?pathway+hsa00010) (a) and an anabolic pathway (histidine biosynthesis) (from http://www.genome.jp/kegg/pathway/map/map00340.html) (b) in the gamma-proteobacterium Escherichia coli K12