Nucleic Acids Research, Vol 27, Issue 21 e31-e31, Copyright © 1999 by Oxford University Press
WM Schmidt and MW Mueller
Here we present CapSelect as a novel experimental approach for the
selective enrichment of full-length cDNAs in PCR-mediated analysis of mRNA
sequences. The method combines the 5'-CAP-dependent addition of
specifically three to four non-templated dCMP residues to the 3'-end of
full-length cDNAs by reverse transcriptases in the presence of manganese
and the controlled ribonucleotide tailing of cDNA ends by terminal
deoxynucleotidyl transferase using rATP. By virtue of the generated
terminal sequence motif (5'-dC(3-4)rA(3-4)), full-length cDNAs are
selectively anchored to a double-stranded DNA adapter (with a
dT(3-4)dG(3)3'-overhang) by T4 DNA ligase. The technique described is
highly efficient, discriminates premature termination products and enriches
full-length cDNAs.
ARTICLES
CapSelect: a highly sensitive method for 5' CAP-dependent enrichment of full-length cDNA in PCR-mediated analysis of mRNAs
VBC-GENOMICS Research GmbH, PO Box 207, A-1091 Vienna, Austria.
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