Methods, systems, and computer readable media for repeat sequencing
First Claim
1. A method for sequencing a nucleic acid template, comprising:
- (a) performing a first sequencing process on a first portion of the nucleic acid template to obtain a first sequencing result using a sequencing instrument configured to sequence a given sample two or more times, wherein the first sequencing process includes delivering first reagents including a first polymerase and first primers to the nucleic acid template and further includes flowing nucleotides to the nucleic acid template according to a first order comprising a first 4-flow block of flows comprising a first 4-flow permutation of flows A, C, G, and T, followed by a first predetermined number of repeats of a first 3-flow permutation of a first set of three flows selected from A, C, G, and T, followed by an isolated flow of the nucleotide not in the first set; and
(b) after the first sequencing process, performing a second sequencing process on a second portion of the nucleic acid template to obtain a second sequencing result using the sequencing instrument, wherein the second sequencing process includes delivering second reagents including a second polymerase and second primers to the nucleic acid template and further includes flowing nucleotides to the nucleic acid template according to a second order different from the first order, wherein the first and second portions of the nucleic acid template may overlap at least partially, completely, or not at all.
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Abstract
A method for sequencing a nucleic acid template includes: (a) performing a first sequencing process including flowing nucleotides and/or reagents to the nucleic acid template according to a first predetermined ordering of nucleotides and/or reagents to obtain a first sequencing result; (b) after the first sequencing process, performing a second sequencing process including flowing nucleotides and/or reagents to the nucleic acid template according to a second predetermined ordering of nucleotides and/or reagents to obtain a second sequencing result, the second predetermined ordering of nucleotides and/or reagents being different from the first predetermined ordering of nucleotides and/or reagents and at least one of the first and second predetermined orderings of nucleotides and/or reagents being designed for repeat sequencing; and (c) determining a sequence of bases corresponding to at least a portion of the nucleic acid template using both the first sequencing result and the second sequencing result.
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Citations
20 Claims
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1. A method for sequencing a nucleic acid template, comprising:
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(a) performing a first sequencing process on a first portion of the nucleic acid template to obtain a first sequencing result using a sequencing instrument configured to sequence a given sample two or more times, wherein the first sequencing process includes delivering first reagents including a first polymerase and first primers to the nucleic acid template and further includes flowing nucleotides to the nucleic acid template according to a first order comprising a first 4-flow block of flows comprising a first 4-flow permutation of flows A, C, G, and T, followed by a first predetermined number of repeats of a first 3-flow permutation of a first set of three flows selected from A, C, G, and T, followed by an isolated flow of the nucleotide not in the first set; and (b) after the first sequencing process, performing a second sequencing process on a second portion of the nucleic acid template to obtain a second sequencing result using the sequencing instrument, wherein the second sequencing process includes delivering second reagents including a second polymerase and second primers to the nucleic acid template and further includes flowing nucleotides to the nucleic acid template according to a second order different from the first order, wherein the first and second portions of the nucleic acid template may overlap at least partially, completely, or not at all. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15)
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10. A system for sequencing a nucleic acid template, comprising:
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a machine-readable memory; and a processor configured to execute machine-readable instructions, which, when executed by the processor, cause the system to perform a method comprising; (a) performing a first sequencing process on a first portion of the nucleic acid template to obtain a first sequencing result using a sequencing instrument configured to sequence a given sample two or more times, wherein the first sequencing process includes delivering first reagents including a first polymerase and first primers to the nucleic acid template and further includes flowing nucleotides to the nucleic acid template according to a first order comprising a first 4-flow block of flows comprising a first 4-flow permutation of flows A, C, G, and T, followed by a first predetermined number of repeats of a first 3-flow permutation of a first set of three flows selected from A, C, G, and T, followed by an isolated flow of the nucleotide not in the first set; and (b) after the first sequencing process, performing a second sequencing process on a second portion of the nucleic acid template to obtain a second sequencing result using the sequencing instrument, wherein the second sequencing process includes delivering second reagents including a second polymerase and second primers to the nucleic acid template and further includes flowing nucleotides to the nucleic acid template according to a second order different from the first order, wherein the first and second portions of the nucleic acid template may overlap at least partially, completely, or not at all. - View Dependent Claims (16, 17, 18)
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11. A non-transitory machine-readable storage medium comprising instructions which, when executed by a processor, cause the processor to perform a method for nucleic acid sequencing comprising:
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(a) performing a first sequencing process on a first portion of the nucleic acid template to obtain a first sequencing result using a sequencing instrument configured to sequence a given sample two or more times, wherein the first sequencing process includes delivering first reagents including a first polymerase and first primers to the nucleic acid template and further includes flowing nucleotides to the nucleic acid template according to a first order comprising a first 4-flow block of flows comprising a first 4-flow permutation of flows A, C, G, and T, followed by a first predetermined number of repeats of a first 3-flow permutation of a first set of three flows selected from A, C, G, and T, followed by an isolated flow of the nucleotide not in the first set, followed by a second 4-flow permutation of flows A, C, G, and T different than the first 4-flow permutation, followed by a second predetermined number of repeats of a second 3-flow permutation of a second set of three flows selected from A, C, G, and T different than the first set, followed by an isolated flow of the nucleotide not in the second set; and (b) after the first sequencing process, performing a second sequencing process on a second portion of the nucleic acid template to obtain a second sequencing result using the sequencing instrument, wherein the second sequencing process includes delivering second reagents including a second polymerase and second primers to the nucleic acid template and further includes flowing nucleotides to the nucleic acid template according to a second order different from the first order, wherein the first and second portions of the nucleic acid template may overlap at least partially, completely, or not at all. - View Dependent Claims (19, 20)
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Specification