Method for forming full-length cDNA libraries
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United States of America Patent
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Nov 7, 2000
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N/A
app pub date -
Jul 16, 1999
filing date -
Nov 1, 1996
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Abstract
Disclose is a method for making full-length cDNA libraries, which is for making libraries of cDNAs having lengths corresponding to full lengths of mRNAs and comprises the following steps of; forming RNA-DNA hybrids by reverse transcription starting from primers using mRNAs as templates, chemically binding a tag molecule to a diol structure present in the 5' Cap (.sup.7Me G.sub.ppp N) site of a mRNA which is forming a RNA-DNA hybrid, and separating RNA-DNA hybrids carrying a DNA corresponding to a full-length mRNA from the RNA-DNA hybrids formed above by using a function of the tag molecule. The present method is a method for preparing full-length cDNA libraries utilizing a method for labeling the 5' Cap site more efficiently than protein enzyme reactions, which is avoidable a decrease of a full-length cDNA synthesis efficiency caused by cleavage of mRNA, and can synthesize a full-length cDNA more efficiently.
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