INTEGRATED MICROFLUIDIC DEVICE FOR GENE SYNTHESIS
First Claim
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1. A method for synthesizing double-stranded DNA in a microfluidic device, the device comprising a PCR-assembly (PCA) chamber in controllable fluid communication with a polymerase chain reaction (PCR) chamber, the method comprising the steps of:
- (a) applying a time-varying thermal field to the PCA chamber containing a plurality of different oligonucleotides and polymerase, wherein each oligonucleotide has partial base complementarity with at least one other oligonucleotide, thereby assembling the oligonucleotides into templates for PCR in the absence of terminal PCR primers;
(b) loading the templates produced in step (a) into the PCR chamber in the presence of a PCR precursor mix comprising the terminal PCR primers, dNTPs and polymerase; and
(c) applying a time-varying thermal field to the PCR chamber, thereby obtaining a PCR product mixture comprising the double-stranded DNA.
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Abstract
We report making an integrated micro-fluidic device for synthesizing double stranded DNA from short oligo-nucleotides. We demonstrate successful synthesis of a 760 bp gene segment from a pool of 39 oligonucleotides on a micro-fluidic device using both the one-step and two-step synthesis processes. We also describe purifying the double stranded DNA PCR product and filtering out sequence errors in the double stranded DNA product, all on the same device.
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Citations
20 Claims
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1. A method for synthesizing double-stranded DNA in a microfluidic device, the device comprising a PCR-assembly (PCA) chamber in controllable fluid communication with a polymerase chain reaction (PCR) chamber, the method comprising the steps of:
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(a) applying a time-varying thermal field to the PCA chamber containing a plurality of different oligonucleotides and polymerase, wherein each oligonucleotide has partial base complementarity with at least one other oligonucleotide, thereby assembling the oligonucleotides into templates for PCR in the absence of terminal PCR primers; (b) loading the templates produced in step (a) into the PCR chamber in the presence of a PCR precursor mix comprising the terminal PCR primers, dNTPs and polymerase; and (c) applying a time-varying thermal field to the PCR chamber, thereby obtaining a PCR product mixture comprising the double-stranded DNA. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 16, 17, 18, 19, 20)
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11. A method for synthesizing double-stranded DNA in a microfluidic device, the device comprising a synthesis chamber in controllable fluid communication with a purification chamber, the method comprising the steps of:
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(a) applying a time-varying thermal field to the synthesis chamber containing terminal PCR primers, polymerase, dNTPs and a plurality of different oligonucleotides wherein each oligonucleotide has partial base complementarity with at least one other oligonucleotide, thereby obtaining a PCR product mixture comprising the double-stranded DNA; and (b) loading the PCR product mixture into the purification chamber to immobilize the double-stranded DNA, thereby separating the double-stranded DNA from free dNTPs, primers and unpolymerized oligonucleotides. - View Dependent Claims (12, 13, 14, 15)
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Specification