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Table 1 Topological parameters for the metabolic networks of E. coli and Buchnera APS

From: A fragile metabolic network adapted for cooperation in the symbiotic bacterium Buchnera aphidicola

Bacterium (model) Reaction graph Goodness of fit of node distribution2
  Path length1 Compound graph Reaction graph
  Mode Max. path length No. of unreachable nodes/total no. of nodes (%) In-degree Out-degree Total In-degree Out-degree Total
Buchnera iGT196 8 25 19,493/55,932
(34%)
1.622 (0.448) 2.020 (0.211) 1.700 (0.487) 2.411 (0.115) 2.327 (0.114) 1.701 (0.344)
E. coli iJR904 6 19 108,467/369,056
(29%)
1.911 (0.222) 1.905 (0.212) 1.622 (0.448) 2.104 (0.127) 2.114 (0.112) 1.623 (0.333)
  1. 1 number of reactions between every pair of metabolites.
  2. 2 In-degree is the number of substrates and out-degree is the number of products for the reaction graph. The value of gamma is shown with the Kolmogorov-Smirnov statistic in parentheses, with critical values (α = 0.01) of 0.050 for E. coli and 0.110 for Buchnera.