Figure 3From: The evolution of vertebrate tetraspanins: gene loss, retention, and massive positive selection after whole genome duplicationsThe chordate TSPAN4 gene clusters in amphioxus and humans. Triangles show the gene direction. Picture is not drawn to scale. The relationships between four human paralogous region are shown using a tree pattern. An inferred TSPAN4 cluster in the pre-WGD vertebrate ancestor is also provided.Back to article page