A method of cleaving double stranded DNA.

摘要

A method of cleaving double stranded DNA at any given point which comprises: (a) converting the double stranded DNA to single-stranded DNA in a region surrounding the intended cleavage site; (b) hybridizing to the single-stranded region formed in step (a) a complementary primer length of single-stranded DNA, the 5 min end of the primer lying opposite the nucleotide adjoining the intended cleavage site; (c) restoring that portion of the second strand eliminated in step (a) which lies in the 3 min direction from said primer by reaction with DNA polymerase in the presence of adenine, thymine, guanine and cytosine-containing deoxynucleotide triphosphates; and (d) digesting the remaining single-stranded lenght of DNA which protrudes beyond the intended cleavage point.