PTS-AG Superfamily
Chang A.B., Lin R., Studley W.K., Tran C.V., Saier M.H. Jr. 2004. Phylogeny as a Guide to Structure and Function of Membrane Transport Proteins. Mol Membr Biol. 21(3):171-81.
4.A.5 -
The PTS Galactitol (Gat) Family
4.A.7 -
The PTS L-Ascorbate (L-Asc) Family