Additional file 2.

Projected network's degree distribution from the generating function approach (Figure S2). Assuming that both protein and complex's degree distributions follow the exponential degree distribution p(k) ~ exp(-k), the projected network's degree distribution is numerically calculated with the generating function approach mentioned in the main text. One can clearly observe that the degree distribution follows the exponential tail for k ≫ 1.

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Lee et al. BMC Systems Biology 2011 5:126   doi:10.1186/1752-0509-5-126