Figure 5From: Divergent evolution and molecular adaptation in the Drosophila odorant-binding protein family: inferences from sequence variation at the OS-E and OS-FgenesUnrooted tree with the pre-specified foreground branches used in the ML branch-site analysis. The OS-X sequences were not considered in this analysis (see Methods). b1 and b2 correspond to the D. melanogaster and D. guanche OS-E external lineages, respectively. Λ, Putative OS-E and OS-F ancestral protein node.Back to article page