Figure 2From: The evolution of vertebrate tetraspanins: gene loss, retention, and massive positive selection after whole genome duplicationsThe protein phylogenetic (ME) tree of invertebrate deuterostome tetraspanins. Proteins marked with a rectangle are members of the TSPAN4 gene cluster. This tree includes all 39 amphioxus sequences but omitted 9 C. instestinalis sequences and 5 S. purpuratus. Readers interested in the omitted genes are referred to Figure S1-4.Back to article page