Compositions and methods for cDNA synthesis
First Claim
1. A method for first strand cDNA synthesis comprising contacting one or more RNA molecules with a reagent mixture, wherein said reagent mixture comprises:
- (a) at least one reverse transcriptase;
(b) a combination of primers wherein said combination comprises;
(i) an effective amount of a mixture of random primers, wherein said random primers are present in a concentration of between about 5 ng/μ
l and about 20 ng/μ
l;
(ii) an effective amount of oligo(dT), wherein said oligo(dT) is present in a concentration less than about 2 μ
M,and incubating the resulting solution under conditions suitable for first strand cDNA synthesis wherein said random primers and said oligo (dT) prime cDNA synthesis in a single step.
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Abstract
Methods for making cDNA molecules, for amplification of RNA by PCR and for preparation of cDNA libraries are provided. Kits for making cDNA molecules also are provided. Compositions are also provided comprising mixtures of reagents, including reverse transcriptases, buffers, cofactors and other components, suitable for immediate use in conversion of RNA into cDNA and RT PCR without dilution or addition of further components. These compositions are useful, alone or in the form of kits, for cDNA synthesis or nucleic acid amplification (e.g., by the Polymerase Chain Reaction) or for any procedure utilizing reverse transcriptases in a variety of research, medical, diagnostic, forensic and agricultural applications.
47 Citations
20 Claims
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1. A method for first strand cDNA synthesis comprising contacting one or more RNA molecules with a reagent mixture, wherein said reagent mixture comprises:
-
(a) at least one reverse transcriptase; (b) a combination of primers wherein said combination comprises; (i) an effective amount of a mixture of random primers, wherein said random primers are present in a concentration of between about 5 ng/μ
l and about 20 ng/μ
l;(ii) an effective amount of oligo(dT), wherein said oligo(dT) is present in a concentration less than about 2 μ
M,and incubating the resulting solution under conditions suitable for first strand cDNA synthesis wherein said random primers and said oligo (dT) prime cDNA synthesis in a single step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification