| abstract |
1. A method of cleaving double stranded DNA at any given point which comprises:n (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' 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' 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. |