Figure 4From: Evolution of gene fusions: horizontal transfer versus independent eventsPhylogenetic trees for fusion-linked COGs: chorismate mutase and prephenate dehydratase. (a) Chorismate mutase (COG1605); (b) prephenate dehydratase (COG0077). Protein designations are as in Figure 2. The protein AF0227 contains a prephenate dehydrogenase domain in addition to the chorismate mutase and prephenate dehydratase domains.Back to article page