Active-source-pixel, integrated device for rapid analysis of biological and chemical specimens
First Claim
1. A method of sequencing a nucleic acid molecule, comprising:
- providing excitation energy to a sample well formed at a first pixel on a substrate;
receiving, at a sensor formed at the first pixel, a first emission from the sample well, wherein the first emission is associated with a type of nucleic acid subunit from among different types of nucleic acid subunits;
producing, by the sensor, a first signal and a second signal representative of the received first emission;
acquiring the first signal at a first time and the second signal at a second time during charge-accumulation at the sensor for the first emission;
analyzing the first signal and the second signal; and
identifying the type of the nucleic acid subunit based upon the analysis of the first signal and the second signal.
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Abstract
An active-source-pixel, integrated device capable of performing biomolecule detection and/or analysis, such as single-molecule nucleic acid sequencing, is described. An active pixel of the integrated device includes a sample well into which a sample to be analyzed may diffuse, an excitation source for providing excitation energy to the sample well, and a sensor configured to detect emission from the sample. The sensor may comprise two or more segments that produce a set of signals that are analyzed to differentiate between and identify tags that are attached to, or associated with, the sample. Tag differentiation may be spectral and/or temporal based. Identification of the tags may be used to detect, analyze, and/or sequence the biomolecule.
165 Citations
28 Claims
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1. A method of sequencing a nucleic acid molecule, comprising:
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providing excitation energy to a sample well formed at a first pixel on a substrate; receiving, at a sensor formed at the first pixel, a first emission from the sample well, wherein the first emission is associated with a type of nucleic acid subunit from among different types of nucleic acid subunits; producing, by the sensor, a first signal and a second signal representative of the received first emission; acquiring the first signal at a first time and the second signal at a second time during charge-accumulation at the sensor for the first emission; analyzing the first signal and the second signal; and identifying the type of the nucleic acid subunit based upon the analysis of the first signal and the second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for sequencing a target nucleic acid molecule, the method comprising:
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providing an integrated device that includes (i) a sample well containing said target nucleic acid molecule, a polymerizing enzyme and a plurality of types of nucleotides or nucleotide analogs, and (ii) at least one excitation source that directs excitation energy to said sample well; performing an extension reaction at a priming location of said target nucleic acid molecule in the presence of said polymerizing enzyme to sequentially incorporate said nucleotides or nucleotide analogs into a growing strand that is complementary to said target nucleic acid molecule, wherein upon incorporation and excitation by excitation energy from said excitation source, said nucleotides or nucleotide analogs produce emissions from said sample well; detecting said emissions at a sensor that is configured to receive said emissions from said sample well; receiving signal sets from the sensor for each detected emission, wherein the signal sets are representative of spatial and/or temporal distributions of said detected emissions and distinguish types of nucleotides or nucleotide analogs and wherein a signal set of the signal sets comprises a first signal acquired at a first time and a second signal acquired at a second time during charge-accumulation at the sensor; and identifying the types of nucleotides or nucleotide analogs based on said received signal sets, thereby sequencing said target nucleic acid molecule. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification