Methods of detecting N-and O-linked oligosaccharides in glycoproteins
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United States of America Patent
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Issued Date -
May 10, 2007
app pub date -
Nov 9, 2005
filing date -
Nov 9, 2005
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Abstract
Methods for removing N-linked and O-linked oligosaccharides from a glycoprotein including N-linked and O-linked oligosaccharides are provided. N-linked oligosaccharides are enzymatically cleaved from a glycoprotein to form cleaved-off N-linked oligosaccharides and residual glycoprotein. Residual glycoprotein is immobilized on a solid substrate. The cleaved-off N-linked oligosaccharides are separated from the residual glycoprotein. Subsequently, O-linked oligosaccharides are separated from the residual glycoprotein to form cleaved-off O-linked oligosaccharides and a residual protein. The cleaved-off O-linked oligosaccharides are separated from the residual protein. The N-linked and O-linked oligosaccharides are thus removed separately from the glycoprotein, and can be detected separately.
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