Electrode and method for the detection of an affinity reaction
First Claim
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1. An electrode for the detection or quantification of a Selective Binding reaction comprising:
- an electrode having a testing surface substantially covered with a transducing film comprising an immobilized polymer network which provides for electrical conduction in the absence of diffusional mediators and a selective binding unit (SBU) where the SBU where the SBU has a specific affinity for a chemical, biological agent, or a class of chemicals, and includes immobilizing and oxidoreductase to the SBU'"'"'s conjugate to bind with the SBU, wherein the oxidoreductase is reversibly immobilized at the electrode and electrical conduction between the electrode and the immobilized oxidoreductase occurs.
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Abstract
An amperometric biosensor for the detection of an affinity reaction is described. The sensor includes an electrode having on its testing surface a hydrogel in which a selective binding unit and redox species are immobilized.
109 Citations
15 Claims
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1. An electrode for the detection or quantification of a Selective Binding reaction comprising:
- an electrode having a testing surface substantially covered with a transducing film comprising an immobilized polymer network which provides for electrical conduction in the absence of diffusional mediators and a selective binding unit (SBU) where the SBU where the SBU has a specific affinity for a chemical, biological agent, or a class of chemicals, and includes immobilizing and oxidoreductase to the SBU'"'"'s conjugate to bind with the SBU, wherein the oxidoreductase is reversibly immobilized at the electrode and electrical conduction between the electrode and the immobilized oxidoreductase occurs.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
- 8. A method for sensing the occurrence of a binding reaction between a selective binding unit (SBU) and a conjugate to the SBU where changing of the incubation solution is not necessary to differentiate bound and unbound conjugate comprising the steps of coating a current collecting electrode with a hydrogel, the polymer network of which comprises SBUs and multiple reducible and oxidizable centers chemically bound to the network, immersing the hydrogel coated electrode in a solution containing the conjugate, to which an oxidoreductase is covalently bound, allowing the SBU to bind with its conjugate, and measuring the current frown the electrode when the electrolytic solution contains a substrate of the oxidoreductases.
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