The molecule is a glycosylgalactose comprising two D-galactose units joined via an alpha-(1->3) linkage. It has a role as an antigen, an epitope and a carbohydrate allergen.
(3R,4S,5S,6R)-6-(hydroxymethyl)-4-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxane-2,3,5-triol