β-Galactosidase obtained from Aspergillus oryzae was found to have strong transglycosylation activity. The glycosylation of water-soluble and insoluble alcohols was successfully performed under mild conditions (pH 5 at 4-37°C) with this enzyme. The enzyme was also applied to the onestep synthesis of several cardiac glycosides that are diffcult to obtain by ordinary chemical methods.
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Ooi et al. (1985) studied this question.