Immobolization of biomolecules by enhanced electrophoretic precipitation
First Claim
1. A method of preparing a biosensor electrode having a biomolecular component comprisingpreparing a solution of at least one species of biomolecule intended for deposition buffered range sufficient to prevent denaturation of the biomolecules, and to a pH such that all species of biomolecules intended for deposition have the same net electric charge sign due to their respective isoelectric points,immersing said biosensor electrode and a counter electrode in the solution,applying a variable potential of less than 1 volt across the biosensor electrode and counter electrode, with the potential varying in a manner selected to provide a substantially constant electric current between the electrodes sufficient to cause migration of the biomolecules intended for deposition to said biosensor electrode and accumulation thereon.
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Accused Products
Abstract
The present invention provides a method for immobilizing biomolecules on a conductive substrate to produce a biosensor.
91 Citations
8 Claims
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1. A method of preparing a biosensor electrode having a biomolecular component comprising
preparing a solution of at least one species of biomolecule intended for deposition buffered range sufficient to prevent denaturation of the biomolecules, and to a pH such that all species of biomolecules intended for deposition have the same net electric charge sign due to their respective isoelectric points, immersing said biosensor electrode and a counter electrode in the solution, applying a variable potential of less than 1 volt across the biosensor electrode and counter electrode, with the potential varying in a manner selected to provide a substantially constant electric current between the electrodes sufficient to cause migration of the biomolecules intended for deposition to said biosensor electrode and accumulation thereon.
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7. A method of preparing a biosensor electrode having a proteinaceous component comprising
preparing a solution of at least one species of protein intended for deposition buffered sufficient to prevent denaturation of the protein immersing said biosensor electrode and a counter electrode in the solution, applying a variable potential of less than 1 volt across the biosensor electrode and counter electrode, with the potential varying with time in a manner selected to provide a substantially constant electric current between the electrodes sufficient to cause migration of the biomolecules intended for deposition to said biosensor electrode and accumulation thereon, and crosslinking said deposited accumulation on the biosensor electrode with a crosslinking agent to form a water-insoluble mass on the biosensor electrode.
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8. A method of preparing an enzymatic biosensor comprising
preparing a solution of glucose oxidase intended for deposition on a biosensor electrode, immersing said biosensor electrode and a counter electrode in the solution, applying a variable potential of less than 1 volt across the biosensor electrode and counter electrode, with the potential varying with time in a manner selected to provide a substantially constant electric current between the electrodes sufficient to cause migration of the glucose oxidase intended for deposition to said biosensor electrode and accumulation of a film less than 10 micrometers thereon.
Specification