Patent ID: 7960113

Claim:
A DNA analysis system comprising: a vessel bearing an immobilized nucleic acid or containing an article bearing an immobilized nucleic acid, wherein the vessel is configured to receive a liquid; a reagent in the vessel, which converts pyrophosphoric acid formed as a result of an extension reaction of the nucleic acid into a redox compound; one or more measuring electrodes that are in contact with the liquid to be contained in the vessel for detecting the redox compound; an electrochemically active material that is immobilized to a surface of the measuring electrode through an insulating molecule; a reference electrode that is in contact with the liquid; one or more potentiometers that measure interface potentials of the one or more measuring electrodes; a first feeder that feeds dATP or an analogue thereof to the vessel; a second feeder that feeds dGTP or an analogue thereof to the vessel; a third feeder that feeds dCTP or an analogue thereof to the vessel; and a fourth feeder that feeds dTTP or an analogue thereof to the vessel.