Abstract
1. A transglucosylase fraction has been obtained from the mycelium of Aspergillus niger. 2. The preparation will transfer alpha-d-glucopyranosyl residues from maltose and other alpha-d-glucopyranosides to phenolic and alcoholic hydroxyl groups and to carboxylic acid groups. 3. alpha-Isomaltosides and alpha-maltosides are formed when resorcinol and catechol are used as acceptors. 4. pH precipitation and DEAE-cellulose chromatography were used to resolve the activity into two fractions. The properties, in particular polyol inhibition, of one of these fractions have been examined in detail.
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