Evolution of the WASP family proteins in amoebae and Apusozoa. Schematic representation of the phylogenetic tree of the sequenced amoebae and Apusozoa species. Branch lengths are arbitrary. The WASP family protein inventories of the species have been plotted to the tree with WASP families given in colour-coded boxes. White boxes indicate losses of WASP family proteins in the Entamoeba lineage.