Fig. 5From: Evolutionary history of phosphatidylinositol- 3-kinases: ancestral origin in eukaryotes and complex duplication patternsDomain composition of catalytic proteins. The schematic phylogenetic tree on the left corresponds to the complete tree of Fig. 1. Light colored circles indicate domains specific to some class I and II subgroups. Box sizes are not related to the real length of the domainsBack to article page