Dataset Correlations. The bar graph shows the Spearman's rank correlation coefficients observed between number of interactions and evolutionary rate. Evolutionary rate was estimated using two sets of orthologs, from M musculus and S paradoxus. Good correlations all had low P-values (< 0.03) while the poor correlations had high P-values > 0.03. Where P-values were significant, correlations using S paradoxus orthologs were slightly weaker, yet the general magnitude followed the same trend shown by the correlations obtained using M musculus orthologs.