Nucleic Acids Research, Vol 25, Issue 8 1611-1617, Copyright © 1997 by Oxford University Press
KW Porter, JD Briley and BR Shaw
A method is described to simultaneously amplify and sequence DNA using a
new class of nucleotides containing boron. During the polymerase chain
reaction, boron-modified nucleotides, i.e. 2'-deoxynucleoside 5'-
alpha-[P-borano]-triphosphates, are incorporated into the product DNA. The
boranophosphate linkages are resistant to nucleases and thus the positions
of the boranophosphates can be revealed by exonuclease digestion, thereby
generating a set of fragments that defines the DNA sequence. The
boranophosphate method offers an alternative to current PCR sequencing
methods. Single-sided primer extension with dideoxynucleotide chain
terminators is avoided, with the consequence that the sequencing fragments
are derived directly from the original PCR products. Boranophosphate
sequencing is demonstrated with the Pharmacia and the Applied Biosystems
373A automatic sequencers, producing data that is comparable with cycle
sequencing.
ARTICLES
Direct PCR sequencing with boronated nucleotides
Department of Chemistry, Duke University, Durham, NC 27708, USA.
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