Figure 3.
Positive selection on the C-minus OBP family. The top panel shows the number of non-synonymous substitutions divided by the number of synonymous substitutions when this ratio is >1. Amino acids detected to be significantly under positive selection by both BEB and REL (see Methods) are in black. The bottom panel shows the residues (dots) forming either the binding pocket or its lip in four OBPs for which the secondary structures are known. Those residues that correspond to positively selected amino acids of the C-minus OBPs in the top panel are enclosed.
