Charge switch nucleotides
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Abstract
The present invention provides compounds, methods and systems for sequencing nucleic acid using single molecule detection. Using labeled NPs that exhibit charged-switching behavior, single-molecule DNA sequencing in a microchannel sorting system is realized. In operation, sequencing products are detected enabling real-time sequencing as successive detectable moieties flow through a detection channel. By electrically sorting charged molecules, the cleaved product molecules are detected in isolation without interference from unincorporated NPs and without illuminating the polymerase-DNA complex.
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Citations
26 Claims
- 1. A compound having Formula I:
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13. A method for detecting the presence of a DNA sequence, said method comprising:
- a) conducting a DNA polymerase reaction in the presence of a terminal-phosphate-labeled nucleotide, which reaction results in the production of a labeled polyphosphate;
b) permitting said labeled polyphosphate to react with a phosphate or polyphosphate transferring enzyme to produce a fluorophore moiety; and
c) detecting the presence of said fluorophore moiety. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 22, 25, 26)
- a) conducting a DNA polymerase reaction in the presence of a terminal-phosphate-labeled nucleotide, which reaction results in the production of a labeled polyphosphate;
Specification