Method for generating single-stranded DNA molecules
First Claim
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1. A method for generating a desired single-stranded nucleic acid molecule, substantially free of any nucleic acid molecule of complementary sequence, said method comprising the steps:
- A) incubating a preselected nucleic acid molecule in the presence of a primer molecule;
wherein said primer molecule is capable of hybridizing to said preselected molecule, and wherein said primer molecule contains a region of at least four phosphorothioate nucleotide residues at said primer'"'"'s 5'"'"' terminus;
B) permitting template-dependent extension of said primer to thereby form said desired nucleic acid molecule; and
C) adding to said incubation a 5'"'"'→
3'"'"' exonuclease selected from the group consisting of T7 5'"'"'→
3'"'"' exonuclease and lambda 5'"'"'→
3'"'"' exonuclease, under conditions sufficient to eliminate said preselected molecule, and to thereby generate said desired single-stranded molecule substantially free of any nucleic acid molecule of complementary sequence.
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Abstract
A method for generating single-stranded nucleic acid molecules. The molecules contain nuclease resistant modified nucleotides, such that they are resistant to 5'"'"'→3'"'"' exonucleases.
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Citations
14 Claims
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1. A method for generating a desired single-stranded nucleic acid molecule, substantially free of any nucleic acid molecule of complementary sequence, said method comprising the steps:
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A) incubating a preselected nucleic acid molecule in the presence of a primer molecule;
wherein said primer molecule is capable of hybridizing to said preselected molecule, and wherein said primer molecule contains a region of at least four phosphorothioate nucleotide residues at said primer'"'"'s 5'"'"' terminus;B) permitting template-dependent extension of said primer to thereby form said desired nucleic acid molecule; and C) adding to said incubation a 5'"'"'→
3'"'"' exonuclease selected from the group consisting of T7 5'"'"'→
3'"'"' exonuclease and lambda 5'"'"'→
3'"'"' exonuclease, under conditions sufficient to eliminate said preselected molecule, and to thereby generate said desired single-stranded molecule substantially free of any nucleic acid molecule of complementary sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for detecting a desired exonuclease resistant amplification product of a polymerase chain reaction which comprises:
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A) conducting a polymerase chain reaction with two primer molecules, wherein one of said primer molecules contains a region of at least four phosphorothioate nucleotide residues at said primer'"'"'s 5'"'"' terminus;
said reaction being sufficient to form double-stranded amplification products;B) subsequently treating said amplification products with a 5'"'"'→
3'"'"' exonuclease selected from the group consisting of T7 5'"'"'→
3'"'"' exonuclease and lambda 5'"'"'→
3'"'"' exonuclease, under conditions to degrade oligonucleotides that lack a sufficient number of phosphorothioate bonds to render said oligonucleotides resistant to said exonuclease;C) detecting said desired amplification product of said polymerase chain reaction by permitting said product to hybridize to a complementary oligonucleotide bound to a solid support.
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13. A kit, being specially adapted to contain in close compartmentalization a first container which contains a first primer, said first primer containing a region of at least four phosphorothioate nucleotide residues at said primer'"'"'s 5'"'"' terminus;
- and a second container which contains a second primer lacking any phosphorothioate nucleotide derivatives, such that the two primers can be used to amplify a predetermined gene sequence.
- View Dependent Claims (14)
Specification