Figure 6.

The distribution of selective constraint variables and correlation between the position of the elements in the IIF pathway and selective constraint estimates.

Notes: A the distribution of d_N/d_S, B the linear relationship between d_N/d_S and position after removing outliers, C the linear relationship between d_N/d_S and position after removing genes from position 1, D the distribution of d_N, E the linear relationship between d_N and position after removing outliers and F the linear relationship between d_N and position after removing genes from position 1. Continuous lines represent regression lines.