M. Handford, C. Rodriguez-Furlán and A. Orellana. Nucleotide-sugar transporters: structure, function and roles in vivo. Braz J Med Biol Res 2006; 39: 1149-1158.  

Figure 2. Phylogenetic tree of nucleotide-sugar transporters. The tree was constructed using Clustal X and the Mega software. Method: Neighbor joining; Model: p-distance; Bootstrap: replications 100.