Figure 3From: Comparative analysis of the Saccharomyces cerevisiae and Caenorhabditis elegans protein interaction networksCorrelation and partial correlation between evolutionary rate, number of interactions and expression level. Kendall's rank correlation (blue) and partial rank correlation coefficients (red) between R and the number of interactions (correcting the partial Ï„ for expression level) and expression (correcting for the number of interactions).Back to article page