Enrichment map displaying the gene set enrichment analysis (GSEA) results in both the CNS and eyes.  Significant GO terms/functional categories are represented by a circular node. Results from the CNS and eyes are represented by colouration of the inner node area and node border, respectively. Red represents functional categories upregulated at elevated CO2 and blue represents functional categories downregulated at elevated CO2. Colour intensity represents the normalised enrichment score and node size the number of core enrichment genes in each functional category.