Figure 2.

TAAR gene gains and losses in euarchontan genomes. TAAR gene gain (red) and gene loss (including pseudogenization; blue) events are shown along the branches. T1 to T9 indicate TAAR1 to TAAR9. The current consensus for primate phylogenies with their approximate divergence times (MYA) was obtained from Perelman et al.47 All species belong to Euarchonta except for the mouse (gray, Mus musculus), which is used as an outgroup. The species are listed in the same order as shown in Table 1 (from the top, except for the rat and the cow)