Nucleic acid mediated electron transfer
First Claim
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1. A method of detecting a target nucleic acid sequence in a sample comprising:
- a) initiating electron transfer by applying an initiation signal to a hybridization complex comprising said target sequence, if present, hybridized to a single-stranded nucleic acid probe covalently attached to an electrode, wherein at least one of said probe or target sequence comprises a moiety capable of donating or accepting an electron; and
b) detecting electron transfer between said moiety which donates or accepts an electron and said electrode to distinguish between single stranded and double stranded nucleic acid to detect said target nucleic acid.
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Abstract
The present invention provides for the selective covalent modification of nucleic acids with redox active moieties such as transition metal complexes. Electron donor and electron acceptor moieties are covalently bound to the ribose-phosphate backbone of a nucleic acid at predetermined positions. The resulting complexes represent a series of new derivatives that are bimolecular templates capable of transferring electrons over very large distances at extremely fast rates. These complexes possess unique structural features which enable the use of an entirely new class of bioconductors and photoactive probes.
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12 Claims
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1. A method of detecting a target nucleic acid sequence in a sample comprising:
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a) initiating electron transfer by applying an initiation signal to a hybridization complex comprising said target sequence, if present, hybridized to a single-stranded nucleic acid probe covalently attached to an electrode, wherein at least one of said probe or target sequence comprises a moiety capable of donating or accepting an electron; and b) detecting electron transfer between said moiety which donates or accepts an electron and said electrode to distinguish between single stranded and double stranded nucleic acid to detect said target nucleic acid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification