Nucleic Acids Research, Vol 24, Issue 16 3278-3279, Copyright © 1996 by Oxford University Press
SW Jiang, MA Trujillo and NL Eberhardt
Tandemly repeated DNA sequences generated from single synthetic
oligonucleotide monomers are useful for many purposes. With conventional
ligation procedures low yields and random orientation of oligomers makes
cloning of defined repeated sequences difficult. We solved these problems
using 2 bp overhangs to direct orientation and random incorporation of
linkers containing restriction sites during ligation. Ligation products are
amplified by PCR using the linker oligonucleotides as primers. Restriction
digestion of the PCR products generate multimer distributions whose length
is controlled by the monomer/linker ratio. The concatenated DNA fragments
of defined length, orientation and spacing can be directly used for
subcloning or other applications without further treatment.
ARTICLES
An efficient method for generation and subcloning of tandemly repeated DNA sequences with defined length, orientation and spacing
Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA.
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