Fig. 6
From: The evolution of vitamin C biosynthesis and transport in animals
Proposed SVCT1, SVCT2 and SVCT3 gene evolution in vertebrate species. Gene presence is marked in green, absence in red and uncertainty regarding gene loss/presence in blue. The number of species present in the final dataset and total number of species analysed for each taxonomic group can be seen within parentheses, respectively. The identified gene duplicates are represented next to the cladogram. The known vertebrate WGD events are represented by orange circles in the branches, the Teleost, Salmonidae and Cyprinidae specific WGDs are represented by blue circles and the X. laevis WGD by green circles. The cladogram topology is depicted as in the Tree of Life web project [87]