Glycolysis and TCA cycle of A. niger: a view from the genome-scale network. Nodes represent metabolites while directional links represent metabolic reactions. The color of the nodes represents different functional categories. The size of nodes is proportional to the number of reactions from or to that node (metabolite) in the genome-wide network. The red colored links indicate that A. niger has additional copies of genes for these reactions (see Additional data file 12 for details).
Sun et al. Genome Biology 2007 8:R182 doi:10.1186/gb-2007-8-9-r182