Patent ID: 7056664

Claim:
A method of producing a modified conductive surface, wherein a nucleic acid oligomer or a nucleic acid oligomer modified by attaching a redox-active substance that is selectively oxidizable and reducible at a potential φ with 2.0 V≧φ≦−2.0 V, measured against a normal hydrogen electrode, is hybridized with the nucleic acid oligomer strand which is complementary to the nucleic acid oligomer or the modified nucleic acid oligomer and applied to a conductive surface and is in the form of the double-strand hybrid; and one or more kinds of nucleic acid oligomers in the form of the double-strand hybrid are bound to a conductive surface and only the nucleic acid oligomers bound to the conductive surface are modified by attaching a redox-active substance to the nucleic acid oligomers.