METHODS FOR PROVIDING SIALYLATED OLIGOSACCHARIDES
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United States of America Patent
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Dec 2, 2016
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Dec 7, 2011
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The invention relates to a method for providing analogs of human milk oligosaccharides (HMO), in particular oligosaccharides containing terminal sialic acid. The method comprises the steps of: a) providing a source of non-digestible galactooligosaccharides (GOS) containing at least two terminally bonded β-linked galactose residues; b) providing a sialic acid donor having (α2-3)-sialylated O-glycans; c) contacting said GOS with said sialic acid donor in the presence of an enzyme having trans-sialidase activity in an enzyme reaction mixture; and d) isolating from said enzyme reaction mixture a fraction comprising at least 20 percent by weight of disialylated galactooligosaccharides (di-Sia-GOS) based on the dry matter.
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