Use of phosphorothiolate polynucleotides in ligating nucleic...

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving nucleic acid

Reexamination Certificate

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C435S091100, C436S094000, C536S023100, C536S025300

Reexamination Certificate

active

06951720

ABSTRACT:
The invention provides a method of nonenzymatic ligation of a nucleic acid. The method consists of contacting a polynucleotide-3′ phosphorothiolate with an acceptor polynucleotide under conditions that allow formation of a phosphodiester bond between the polynucleotide-3′ phosphorothiolate and the acceptor polynucleotide. The invention also provides methods of molecular cloning. In one embodiment, the method consists of contacting an insert comprising a polynucleotide-3′ phosphorothiolate with an acceptor vector under conditions that allow formation of a phosphodiester bond between the insert and the acceptor vector to generate a vector comprising an insert polynucleotide. The invention further provides a compound consisting of a polynucleotide-3′ phosphorothiolate and a kit containing a polynucleotide-3′ phosphorothiolate. Also provided is a method of ligating a nucleic acid using a non-sequence specific topoisomerase.

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