Figure 3From: Evolutionary rate patterns of genes involved in the Drosophila Toll and Imd signaling pathwayNonsynonymous ( dN ) and synonymous ( dS ) substitution rates and their ratio ( ω = dN / dS ) as functions of the number of regulatory microRNAs. The significant negative correlation between ω and the number of regulatory miRNAs indicated that genes regulated by more miRNAs were more conserved and therefore evolved more slowly.Back to article page