Comparison of liver tissue mRNA expression in mouse and stickleback. Comparison of the proportion of genes involved in a specific GO ontology term for mouse and three-spine stickleback. Genes that were significantly expressed in liver tissue were mapped to their respective functional categories with Go Term Mapper. For each GO category in the GO Slim generic subset of terms, the proportion of genes representing that term for mouse was plotted against the proportion of genes representing that term for stickleback. (See Additional file 2 - STable 2 for numerical values and GO terms). The line represents a 1:1 relationship. Axes are on a logarithmic scale.