Phylogenetic mapping of Su(var)3-9 evolutionary transitions. Domain gains and losses, gene duplications and the fusion with as well as the re-fission from eIF2γ are shown. Commonly supported phylogeny were used, but for position of hymenopterans see Krauss et al. . The branches of the tree are not to scale. All events are marked with bars, taxa names are italic and protein names are underlaid.