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Fig. 7 | BMC Ecology and Evolution

Fig. 7

From: The evolution of vitamin C biosynthesis and transport in animals

Fig. 7

Proposed SVCT4 gene evolution in vertebrate species. Hypothesis (A) considers a possible ancestral duplication event (AWGD) that preceded all vertebrates after the separation from the Chondrichthyes, originating a putative SVCT5. Hypothesis (B) considers that two independent duplication events might have affected the Actinopteri and Amphibia groups (AcWGD and AmWGD, respectively), originating the SVCT5 and SVCT6 genes. SVCT4, SVCT5 and SVCT6 presence is highlighted in green, absence in red and uncertainty regarding gene loss/presence in light 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 hypothesized duplication events are highlighted in purple. The cladogram topology is depicted as in the Tree of Life web project [87]

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