Immobilization of proteins on inorganic supports
First Claim
1. A method for preparing an immobilized composite from a protein having free amino-functional and carboxyl-functional groups, comprising modifying said protein by reacting at least some of said amino-functional groups with a modifying agent selected from a group consisting of:
- succinic anhydride, succinic acid, malic acid, and glutaric anhydride, to produce a modified protein while leaving some of said amino-functional groups unmodified, depositing said modified protein on the surface of a porous, inorganic support having a high surface area by maintaining said composite within a pH and temperature range which facilitates deposition of said protein, and directly reacting said unmodified groups of said deposited protein with free functional groups in the presence of a carbodiimide agent to form peptide bonds between said deposited proteins, whereby an immobilized protein-support composite is prepared.
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Abstract
A method of producing an immobilized protein composite, i.e. enzymes such as glucose oxidase, on an alumina support, comprising modifying some of the free functional groups of the protein such as amino groups, by reaction with an acid or anhydride, depositing the modified protein on a porous inorganic support at controlled pH and temperature, and cross-linking remaining free functional groups of the protein with adjacent deposited protein functional groups to form interprotein peptide bonds. The resultant composite has long-term continuous use.
12 Citations
17 Claims
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1. A method for preparing an immobilized composite from a protein having free amino-functional and carboxyl-functional groups, comprising modifying said protein by reacting at least some of said amino-functional groups with a modifying agent selected from a group consisting of:
- succinic anhydride, succinic acid, malic acid, and glutaric anhydride, to produce a modified protein while leaving some of said amino-functional groups unmodified, depositing said modified protein on the surface of a porous, inorganic support having a high surface area by maintaining said composite within a pH and temperature range which facilitates deposition of said protein, and directly reacting said unmodified groups of said deposited protein with free functional groups in the presence of a carbodiimide agent to form peptide bonds between said deposited proteins, whereby an immobilized protein-support composite is prepared.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
Specification