Enzymic glucosylation of phenols

Abstract

A transglucosylase fraction has been obtained from the mycelium of Aspergillus niger. 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. [alpha] -Isomaltosides and [alpha] -maltosides are formed when resorcinol and catechol are used as acceptors. pH precipitation and DEAE-cellulose chromatography were used to resolve the activity into 2 fractions. The properties, in particular polyol inhibition, of one of these fractions have been examined in detail.