Illustration of the top gene network upregulated in the environmentally enriched (A) and control (B) groups.

<p>These data were generated by the Ingenuity Pathway Analysis (IPA) software using the 400 genes differentially expressed at <i>P</i><0.005. The genes marked with a red symbol are from the list of differentially expressed genes, whereas the genes marked with a white symbol are intermediary genes of the network added by the software.