Figure 2From: Modularity analysis based on predicted protein-protein interactions provides new insights into pathogenicity and cellular process of Escherichia coli O157:H7Degree distribution of predicted PPI network. Note that the degree distributions follow the power law, indicating it is a scale-free network. The degree exponent value is obtained from fitting to the function P(k) ~ k-γ and is listed in table 2.Back to article page