Most preferably the most frequent pore-diameter of this support material is between about 250 and about 600 A, in particular between about 300 and about 400 A, especially about 340 A. The most favorable immobilized amyloglucosidase composition is obtained if this support material is contacted with a solution containing from about 25 to about 75, preferably about 50 mg of amyloglucosidase per 1 g o