Methods for normalized amplification of nucleic acids
First Claim
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1. A method of amplifying a target sequence from a complex nucleic acid sample comprising:
- obtaining a first amplification product that is enriched for the target sequence by incubating the complex nucleic acid sample in a first amplification reaction, wherein said first amplification reaction comprises polymerase chain reaction with a pair of primers that are specific for said target; and
, obtaining a second amplification product by amplifying an aliquot of the first amplification product with a strand displacing DNA polymerase, in the presence of dNTPs and at least one primer in a second amplification reaction.
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Abstract
Methods of preparing normalized mixtures from a plurality of nucleic acid samples are disclosed. Nucleic acids are amplified so that similar amounts of a target nucleic acid are generated in a plurality of different reactions. Separate amplification reactions are performed to amplify the same or different targets in a plurality of different reactions. The amounts of amplified product are approximately normalized during the amplification without the need to empirically measure the amount of amplified target.
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Citations
22 Claims
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1. A method of amplifying a target sequence from a complex nucleic acid sample comprising:
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obtaining a first amplification product that is enriched for the target sequence by incubating the complex nucleic acid sample in a first amplification reaction, wherein said first amplification reaction comprises polymerase chain reaction with a pair of primers that are specific for said target; and
,obtaining a second amplification product by amplifying an aliquot of the first amplification product with a strand displacing DNA polymerase, in the presence of dNTPs and at least one primer in a second amplification reaction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for obtaining a pooled sample comprising approximately equimolar amounts of a first amplified target sequence and a second amplified target sequence comprising
Amplifying said first target sequence in a first amplification reaction to generate a first amplification product wherein the first target is amplified by PCR with a pair of primers that are specific for said first target sequence; -
amplifying said second target sequence in a second reaction to generate a second amplification product wherein the second target sequence is amplified by PCR with a pair of primers that are specific for said second target sequence;
amplifying an aliquot of said first amplification product in a third amplification reaction, to generate a third amplification product, wherein the third amplification reaction comprises a mixture of random primers, a strand displacing DNA polymerase, and a first amount of dNTPs;
amplifying an aliquot of said second amplification product in a fourth amplification reaction, to generate a fourth amplification product, wherein the fourth amplification reaction comprises a mixture of random primers, a strand displacing DNA polymerase, and a second amount of dNTPs; and
mixing a volume of the third amplification product with a volume of the fourth amplification product to generate a mixture of amplified first and second target sequences wherein the first and second target amplicons are present in approximately equal molar amounts in the mixture. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification