Tests of difference beween degree distributions of essential and nonessential proteins in raw and high-confidence yeast PPI data sets.

a<p>Average degree of essential proteins.</p>b<p>Average degree of nonessential proteins.</p>c<p><i>P</i>-value for two-sample Kolmogorov-Smirnov test for difference between degree distributions of essential and nonessential proteins. The symbol “<” signifies <i>P</i><0.0001.