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. 1979 Jul 11;6(9):3025–3040. doi: 10.1093/nar/6.9.3025

Preparation of triple-block DNA polymers using recombinant DNA techniques.

E Selsing, R D Wells
PMCID: PMC327915  PMID: 493133

Abstract

The construction of several recombinant plasmid derivatives containing novel triple-block DNA sequence insertions is described. The protocol for these constructions involves synthesis of a heterogenous mixture of block oligomer duplexes, : formula: (see text), using pancreatic deoxyribonuclease and terminal transferase. The synthetic duplexes were mixed with linearized and dG-tailed vectors and the DNA mixture used to transform E. coli. Triple-block sequences of the type dGidAjdCk.dGkdTjdCi, characterized by DNA sequencing, were inserted into the Bam HI site of pBR322 and next to the lac wild-type and UV5 promoter regions in pRW26 and pRW28. Similarly, sequences were inserted into the Sma I site of pACYC189 and could be excised by cleavage with Sma I since the procudure regenerates the recognition site. The approach provides a technique for the synthesis of a large family of defined sequence triple-block polymers in essentially unlimited amounts. Although these inserts contain sequences which have the potential for forming stable hairpin structures, the recombinant plasmids are stable and appear to replicate normally.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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