Method of controlling the regioselectivity of glycosidic bonds
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United States of America
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Apr 17, 1990
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app pub date -
Dec 4, 1986
filing date -
Dec 4, 1986
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Abstract
A method of controlling the regioselectivity of the glycosidic bond between glycosyl donor and glycosyl acceptor in the enzymatic production of an oligosaccharide compound which either consists of or is a fragment or an analog of the cabohydrate part in a glycoconjugate, by reverse hydrolysis or transglycosidation reactions, is described. The synthesis is carried out in that a donor substance which is a mono- or oligosaccharide or a glycoside thereof, is caused to react, in the presence of a glycosidase, with an acceptor substance which is an O-, N-, C- or S-glycoside consisting of a monosaccharide, oligosaccharide or a saccharide analog and at least one aglycon which is O-, N-, C- or S-glycosidically bonded in 1-position, the .alpha. or .beta.-configuration being selected on the glycoside bond between the glycosyl group and the aglycon in the acceptor substance, and the oligosaccharide compound being separated from the reaction mixture.
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