Non-chimeric mutational vectors
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United States of America Patent
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Dec 21, 1999
Grant Date -
N/A
app pub date -
May 12, 1998
filing date -
May 12, 1998
priority date (Note) -
Expired
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Abstract
The invention is based on the discovery that Duplex Mutational Vectors are active in prokaryotic cells that contain a strand transfer activity (RecA) and mismatch repair activity (MutS). Using this system a type of Duplex Mutational Vector, termed a Non-Chimeric Mutational Vector, having no RNA:DNA hybrid-duplex, was shown to be active in prokaryotic cells if protected from 3' exonuclease attack. Such protection can be conferred by replacement of a tetrathymidine linker by a nuclease resistant oligonucleotide, such as tetra-2'-O-methyl-uridine, to link the two strands of the recombinagenic oligonucleobase. The claims concern 3'-exonuclease protected Non-Chimeric Mutational Vectors.
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