Method of extracting particular nucleic acid fragment

Details Method of extracting particular nucleic acid fragment Method of extracting particular nucleic acid fragment

C - Chemistry, Metallurgy

07

H

C07H 21/00 (2006.01) C07H 1/00 (2006.01) C12N 15/10 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2042808

A method of extracting a particular nucleic acid fragment containing a nucleic acid sequence of interest from a nucleic acid or nucleic acids mixture, comprising the steps of: (1) digesting the nucleic acid or nucleic acids mixture with restriction enzymes to obtain a mixture of nucleic acid fragments, said restriction enzymes consisting of (A) two different enzymes capable of producing the particular nucleic acid fragment bearing predetermined and distinct restriction ends on its 5' and 3' terminals and (B) one or more restriction enzymes different from (A), for which the particular nucleic acid fragment contains no relevant restriction sites; (2) preparing two distinct DNA linkers capable of binding to the respective restriction ends of the particular nucleic acid fragment; (3) contacting the linkers and nucleic acid fragments under conditions sufficient to ligate complementary ends of the linkers and nucleic acid fragments; (4) subjecting the resulting reaction mixture to a first hybridization with an immobilized probe complementary to one of the linkers; (5) isolating the hybridized nucleic acid fragment from the probe; (6) subjecting the isolated nucleic acid fragment to a second hybridization with an immobilized probe complementary to the other linker; and (7) isolating the hybridized nucleic acid fragment from the probe.

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