Maximum likelihood phylogenetic tree of SEO proteins from different plants. The phylogenetic tree was constructed with RAxML from a T-Coffee protein sequence alignment and with a bootstrap support of 1000 replicates. Bootstrap percentages are shown on the nodes. Branch lengths are proportional to the number of amino acid substitutions. The shaded parts of the tree represent the subgroups identified with OrthoMCL. Mt = Medicago truncatula, Gm = Glycine max, Vf = Vicia faba, Cg = Canavalia gladiata, Ps = Pisum sativum, Md = Malus domestica, At = Arabidopsis thaliana, Vv = Vitis vinifera, Sp = Solanum phureja, pot. ψ = potential pseudogene, pot. ψe = expressed potential pseudogene.