Members of this family are found in within O-antigen biosynthesis clusters in Gram negative bacteria, where they are predicted to function as glycosyltransferases [1,2].

1: The O-antigen gene cluster of Shigella boydii O11 and functional identification of its wzy gene. Tao J, Feng L, Guo H, Li Y, Wang L; FEMS Microbiol Lett. 2004;234:125-132. PMID:15109730

2: Structural and genetic characterization of the Shigella boydii type 18 O antigen. Feng L, Senchenkova SN, Wang W, Shashkov AS, Liu B, Shevelev SD, Liu D, Knirel YA, Wang L; Gene. 2005;355:79-86. PMID:16055280