FIG 4.

Elevated adaptation rate in primate viral receptors. (A) The comparison of dN/dS ratio between viral receptor genes and control genes. (B) The comparison of proportion of the genes subject to positive selection detected by BUSTED analyses between viral receptor genes and control genes. (C) Comparison of the proportion of the branches subject to positive selection between viral receptor genes and control genes. (D) Comparison of the proportion of the sites subject to positive selection between viral receptor genes and control genes. Viral receptor genes and control genes are labeled in orange and blue, respectively.