04758323 is referenced by 396 patents and cites 13 patents.

This specification discloses methods of detection or measurement of an enzyme or of its specific substrate, and sensors used in such methods. The present invention is concerned with a multi-enzyme system, and the specification discloses, as one aspect of the invention a method of assay in which an electrode poised at a suitable potential is contacted with a system comprising a first enzyme, a cofactor linked with said enzyme and a mediator compound which transfers charge to the electrode from the first enzyme when its electrical state is changed by reaction of cofactor material.

The cofactor may be NAD, NADP (both collectively referred to herein as NAD(P)), cAMP, ATP, GTP, TTP, or CTP.

The specification particularly illustrates a method of assay in which an electrode (1) poised at a suitable potential is contacted with a system comprising a first enzyme E.sub.1 a nicotinamide adenine dinucleotide compound N linked with said enzyme E.sub.1 and a mediator compound F which transfers charge to the electrodes from the first enzyme when its electrical state is changed by a NAD(P) NAD(P)H reaction. The NAD compound may act as a "bridge" between the said enzyme/mediator system and further NAD utilizing enzyme E2.

Title
Assay systems using more than one enzyme
Application Number
6/607698
Publication Number
4758323
Application Date
May 7, 1984
Publication Date
July 19, 1988
Inventor
Hugh A O Hill
Oxford
GB
Graham Davis
Bedforshire
GB
Assignee
Genetics International
MA, US
IPC
G01N 27/46
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