| abstract |
The present invention provides a biosensor comprising an electrical insulating substrate having a plurality of surfaces, a plurality of electrode systems formed on at least two of the plurality of surfaces of the substrate, each of the electrode systems having a working electrode and a counter electrode, and a plurality of reaction layers provided on at least two of the plurality of surfaces of the substrate, each of the reaction layers containing an oxidoreductase, wherein the plurality of electrode systems are respectively provided on different surfaces of the substrate, the reaction layers are provided on the surface on which the plurality of electrode systems are formed, and the kind of oxidoreductases contained in the plurality of reaction layers are different from each other. |