Systems and methods for genetic and biological analysis
The invention relate to systems and methods for sequencing polynucleotides, as well as detecting reactions and binding events involving other biological molecules. The systems and methods may employ chamber-free devices and nanosensors to detect or characterize such reactions in high-throughput. Because the system in many embodiments is reusable, the system can be subject to more sophisticated and improved engineering, as compared to single use devices.
1. A method for identifying at least a portion of a biological material, comprising:
(a) providing a sensor array comprising a sensor and said biological material coupled to a support;
(b) using said sensor to detect one or more signals indicative of charge or conductivity, or a change in said charge or said conductivity, within a Debye layer associated with said support while said biological material is coupled to said support; and
(c) identifying said at least said portion of said biological material using said one or more signals detected in (b).
2. The method of claim 1 , wherein said support is a particle having said biological material coupled thereto, and wherein (a) comprises positioning said particle adjacent to said sensor.
3. The method of claim 2 , further comprising, in (b), using a particle capture feature to immobilize said particle adjacent to said sensor.
4. The method of claim 3 , wherein said particle capture feature is a well.
5. The method of claim 3 , wherein said particle capture feature provides an electric or magnetic field that immobilizes said particle adjacent to said sensor in (b).
6. The method of claim 1 , further comprising conducting a reaction while said biological material is coupled to said support, which reaction comprises bringing said biological material in contact with one or more reactive moieties.
7. The method of claim 6 , wherein (c) is conducted during said reaction.
8. The method of claim 1 , wherein said one or more signals are steady state signals.
9. The method of claim 1 , wherein said biological material is a nucleic acid molecule, and wherein said identifying in (c) comprises identifying a sequence of said nucleic acid molecule.
10. The method of claim 9 , wherein identifying said sequence of said nucleic acid molecule comprises generating a complementary sequence of said nucleic acid molecule.
11. The method of claim 10 , further comprising monitoring and correcting for phase error while generating said complementary sequence.
12. The method of claim 11 , further comprising monitoring said one or more signals for loss of signal that is indicative of phase error and correcting said phase error by re-phasing to restore said signals.
13. The method of claim 11 , wherein said phase error is corrected by (i) adding a combination of a plurality of nucleotide bases, (ii) reversibly incorporating a chain terminating nucleotide base into a nucleic acid strand that is complementary to said nucleic acid molecule, or (iii) adding a nucleic acid clamp that hybridizes to said nucleic acid molecule and decreases a rate of generation of said complementary sequence.
14. The method of claim 1 , wherein (b) comprises using said sensor to detect said charge, said conductivity, or said change in said charge or said conductivity within said Debye layer.
15. The method of claim 1 , wherein (b) comprises using said sensor to detect impedance or change in said impedance within said Debye layer.
16. The method of claim 1 , wherein said sensor comprises at least two electrodes, and wherein in (b) said at least two electrodes are associated with said Debye layer.
17. The method of claim 16 , wherein in (b) said at least two electrodes are in electrical communication with said Debye layer.
18. The method of claim 1 , wherein in (b) at least a portion of said sensor is exposed to a solution comprising said biological material.
19. The method of claim 1 , further comprising using a virtual wall to isolate said sensor from another sensor of said sensor array.
20. The method of claim 19 , wherein said virtual wall is generated by an electric field or magnetic field.
21. The method of claim 1 , wherein said biological material is a cell.
22. The method of claim 1 , wherein said biological material is a protein.
23. A method for identifying at least a portion of a biological material, comprising (a) providing a sensor array comprising a sensor and said biological material coupled to a support; (b) using said sensor to detect conductivity or impedance, or a change in said conductivity or said impedance, in proximity to said support while said biological material is coupled to said support; and (c) identifying said at least said portion of said biological material using said change in conductivity or impedance detected in (b).
24. The method of claim 23 , wherein said support is a particle having said biological material coupled thereto, and wherein (a) comprises positioning said particle adjacent to said sensor.
25. The method of claim 23 , further comprising conducting a reaction while said biological material is coupled to said support, which reaction comprises bringing said biological material in contact with one or more reactive moieties.
26. The method of claim 25 , wherein (c) is conducted during said reaction.
27. The method of claim 26 , wherein said biological material is a nucleic acid molecule, and wherein said identifying in (c) comprises identifying a sequence of said nucleic acid molecule.
28. The method of claim 23 , wherein said biological material is a cell.
29. The method of claim 23 , wherein said biological material is a protein.
30. The method of claim 23 , wherein said support is a surface of said sensor or a surface adjacent to said sensor.