Electron induced fluorescent method for nucleic acid sequencing
First Claim
1. A nucleic acid sequencing apparatus comprising:
- a) an input chamber;
b) a microchannel in fluid communication with the input chamber; and
c) a detection unit operably coupled to the microchannel, the detection unit comprising a detector and a micro column electron beam source comprising;
an electron source positioned at the opening of an evacuated column;
a low-voltage gate electrode at the opening of the evacuated column;
aligned high-voltage acceleration, deflection and focusing electrodes perpendicular to the long axis of the evacuated column; and
an electron transparent membrane to seal the far end of the evacuated column.
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Abstract
An apparatus, compositions and related methods for sequencing a target nucleic acid are described. In certain embodiments, the apparatus is a microfluidic apparatus comprising an input chamber, microchannel, output chamber and a detection unit that is operatively connected to the microchannel. In preferred embodiments, the methods include hybridizing a target nucleic acid to one or more probe libraries, moving the hybridized target nucleic acid past the detector, and detecting bound probes. Probe libraries may comprise oligonucleotides or oligonucleotide analogs, preferably with each probe uniquely labeled. A linear order of labeled probes hybridized to the target nucleic acid can be detected and the target nucleic acid sequence deduced. In preferred embodiments, probe labels are detected by analysis of electron-induced fluorescence of probes labeled with conductive polymers.
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Citations
13 Claims
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1. A nucleic acid sequencing apparatus comprising:
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a) an input chamber;
b) a microchannel in fluid communication with the input chamber; and
c) a detection unit operably coupled to the microchannel, the detection unit comprising a detector and a micro column electron beam source comprising;
an electron source positioned at the opening of an evacuated column;
a low-voltage gate electrode at the opening of the evacuated column;
aligned high-voltage acceleration, deflection and focusing electrodes perpendicular to the long axis of the evacuated column; and
an electron transparent membrane to seal the far end of the evacuated column. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
a micro column electron beam source;
inlet and outlet ports;
input and output chambers;
a fluidic focusing region;
a microchannel; and
inlet and outlet exit ports.
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13. The apparatus of claim 1, wherein said detector comprises a spectrophotometer, photomultiplier tube, charge-coupled device, avalanche photodiode or double grating monochromator.
Specification