Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing compound containing saccharide radical
Patent
1996-01-03
1999-10-05
Horlick, Kenneth R.
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing compound containing saccharide radical
536 231, 536 242, 536 253, C12P 1934, C07H 2102, C07H 2104
Patent
active
059622717
ABSTRACT:
Described are compositions and methods which allow for the efficient addition of a defined sequence at the 3'-end of a full-length cDNA in the course of first-strand cDNA synthesis from an mRNA template. A cDNA synthesis primer that is capable of annealing to mRNA is used to prime the first strand synthesis reaction. An oligonucleotide that is linked to the 5'-end of the mRNA serves as a short, extended template such that when the reverse transcriptase enzyme reaches the 5'-end of the mRNA, the enzyme switches templates and proceeds to transcribe through the end of the linked oligonucleotide. As a result, the single-stranded cDNA product which corresponds to the full-length mRNA, will have at the 3'-end a defined sequence which is complementary to the linked oligonucleotide. A conservative element in the oligonucleotide sequence responsible for this reaction can include 3 to 5 guanylic acid residues at the 3'-end of the oligonucleotide. The subject invention provides for the increased synthesis of full-length cDNA from mRNA templates. The full-length cDNA prepared according to the present invention can then be amplified using PCR or cloned using standard procedures.
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Chenchik Alex
Diatchenko Luda
Siebert Paul
Zhu York
Adler Benjamin Aaron
Cloutech Laboratories, Inc.
Horlick Kenneth R.
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