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Fig. 1. (A) Protein interaction network of the nematode Caenorhabditis
elegans using data from The BioGRID (version 2.0.20;
http://www.thebiogrid.org/).
Nodes (proteins) in blue have a connectivity of one. Nodes in green have a
connectivity between two and nine, while the red nodes have a connectivity of
10. Comparison of a linear (B) and logarithmic plot (C) of a Poisson
connectivity distribution (broken line) with mean
=10 and a power-law
connectivity distribution (solid line) with exponent
=2.5.