Glucan 1,6-ñ-isomaltosidase (, exo-isomaltohydrolase, isomalto-dextranase, isomaltodextranase, G2-dextranase, 1,6-ñ-<small>D</small>-glucan isomaltohydrolase) is an enzyme with systematic name 6-ñ-<small>D</small>-glucan isomaltohydrolase. It catalyses hydrolysis of (1âÂÂ6)-ò-<small>D</small>-glucosidic linkages in polysaccharides, to remove successive isomaltose units from the non-reducing ends of the chains
Optimum activity is on those 1,6-ñ-<small>D</small>-glucans containing 6, 7 and 8 glucose units.