Reducing non-covalently bound polysaccharide on supports
First Claim
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1. A method of reducing an amount of non-covalently bound polysaccharide on a support, the method comprising:
- contacting a support comprising both covalently bound polysaccharide and non-covalently bound polysaccharide with an aqueous solution comprising an amount of a chaotropic agent effective to remove non-covalently bound polysaccharide from the support wherein the amount of chaotropic agent in the aqueous solution is about 0.1 M to about 1 M andseparating the support from the aqueous solution wherein the separating comprises contacting the aqueous solution with a membrane and wherein substantiality all of the non-covalently bound polysaccharide passes through the membrane.
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Abstract
Methods and reagents are disclosed for reducing an amount of non-covalently bound polysaccharide on a support. The method comprises contacting a support comprising both covalently bound polysaccharide and non-covalently bound polysaccharide with an aqueous solution comprising an amount of a chaotropic agent effective to remove non-covalently bound polysaccharide from the support.
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Citations
17 Claims
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1. A method of reducing an amount of non-covalently bound polysaccharide on a support, the method comprising:
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contacting a support comprising both covalently bound polysaccharide and non-covalently bound polysaccharide with an aqueous solution comprising an amount of a chaotropic agent effective to remove non-covalently bound polysaccharide from the support wherein the amount of chaotropic agent in the aqueous solution is about 0.1 M to about 1 M and separating the support from the aqueous solution wherein the separating comprises contacting the aqueous solution with a membrane and wherein substantiality all of the non-covalently bound polysaccharide passes through the membrane. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of preparing a conjugate of a support and an assay molecule, said method comprising:
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(a) treating a support under conditions for covalently binding a polysaccharide to the support such that the support comprises both covalently bound polysaccharide and non-covalently bound polysaccharide, (b) contacting the support with an aqueous solution comprising an amount of a chaotropic agent effective to remove non-covalently bound polysaccharide from the support wherein the amount of chaotropic agent in the aqueous solution is about 0.1 M to about 1 M, (c) separating the support from the aqueous solution wherein the separating comprises contacting the aqueous solution with a membrane and wherein substantially all of the non-covalently bound polysaccharide passes through the membrane, and (d) contacting the support with an assay molecule under conditions for binding of the assay molecule to the covalently bound polysaccharide. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method of reducing an amount of non-covalently bound dextran or dextran derivative on a latex particle the method comprising:
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(a) contacting a latex particle comprising both covalently bound dextran derivative and non-covalently bound dextran derivative with an aqueous solution comprising an amount of one or more chaotropic agents effective to remove non-covalently bound dextran derivative from the support, and (b) separating the latex particle from the aqueous solution by contacting the aqueous solution with a membrane wherein substantially all of the non-covalently bound dextran derivative passes through the membrane. - View Dependent Claims (16, 17)
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Specification