Patent ID: 7097751

Claim:
A base sequence detecting electrode comprising: a conductive detecting electrode; first blocking molecules formed so as to cover a surface of the detecting electrode, the first blocking molecules decreasing adsorption of an intercalating agent to the surface of the detecting electrode; a target-complementary probe immobilized to the detecting electrode, the target-complementary probe including a base sequence complementary to a target base sequence which is an object of detection; a conductive comparison electrode; second blocking molecules formed so as to cover a surface of the comparison electrode, the second blocking molecules decreasing adsorption of an intercalating agent to the surface of the comparison electrode; and a dummy probe immobilized to the comparison electrode via a first spacer member including straight chain organic molecules, the dummy probe including a base sequence noncomplementary to the target base sequence which is the object of detection, wherein the detecting electrode is configured to detect a probe current caused by interaction between the intercalating agent and the target-complementary probe hybridized with the target, and the comparison electrode is configured to detect a background current.