An unrooted NJ tree using SET domain amino acid sequences from Populus SET genes (A) and the domain architecture of SET proteins (B). The tree depicts eight subfamilies based on phylogenetic relationship are given as in Figure 1. The black box indicates duplicated gene pairs with domain gains and losses.
Lei et al. BMC Evolutionary Biology 2012 12:51 doi:10.1186/1471-2148-12-51