Figure 3.

Energies of predicted miRNA targets. A density plot of free energies of the most stable predicted miRNA-target duplex for each gene-miRNA pair in (a) mouse, (b) C. elegans, and (c) Drosophila, with genes along the x-axis and miRNAs along the y-axis. A more negative free energy indicates a more stable duplex, relative to its unbound mRNA. Darker colours indicate lower free energies, as shown by the scale in the top-right corner of each sub-figure. White squares indicate no predicted interaction.