Figure 4. Genetic variability in Europe and Africa for all genes located within the 16p11.2 deletion.

A. Nonsynonymous mutations per nonsynonymous sites (pN) and synonymous mutations per synonymous sites (pS) were estimated using the data from 4300 individuals from European ancestry and 2012 individuals from African ancestry available at the Exome Variant Server (http://evs.gs.washington.edu/EVS/). The horizontal lanes correspond to the means of pN and pS for the 27 genes. Difference of pN/pS between Europe and Africa were calculated using a 2-tailed Fisher exact test and the –Log₁₀ P value is indicated. B. Plot of the –Log₁₀ P values obtained for the difference between the pN/pS ratio in Africa and in Europe in relation the ratio (Europe pN/pS) / (Africa pN/pS).