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This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Correlations between Evolutionary Age of Genes (age) and Variable x: the First PC (PC 1), Degree (k), Betweenness Centrality (Btw), Current Information Flow (Cif), the Second PC (PC 2), Bridging Centrality (Bdg), and Clustering Coefficient (Clu)
Significant coefficients (P < 0.001, Spearman correlation test) are indicated in bold.