doi: 10.1016/0005-2787(76)90286-0.
Specific excision of the inserted DNA segment from hybrid plasmids constructed by the poly(dA). poly (dT) method
- PMID: 999917
- DOI: 10.1016/0005-2787(76)90286-0
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Specific excision of the inserted DNA segment from hybrid plasmids constructed by the poly(dA). poly (dT) method
Biochim Biophys Acta.
.
Abstract
The hybrid plasmid PBETAG, consisting of plasmid PMB9 DNA with an insert of rabbit globin DNA (about 600 base pairs) flanked by poly(dA) poly(dT) regions (Maniatis, T., Kee, S.G., Efstratiadis, A. and Kafatos, F.C. (1976) Cell 8, 163-182), was cleaved into two fragments by endonuclease S1 under conditions of partial denaturation. Only the smaller fragment (575 base pairs) contained globin-specific sequences, showing that excision had occurred in the A-T-rich regions. This method of cleavage provides a useful procedure for assessing the length of inserts in hybrid plasmids prepared by the poly(dA)-POLY(DT) tail method, and allows the preparative recovery of the insert.
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