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. 1977 Oct;24(1):249–260. doi: 10.1128/jvi.24.1.249-260.1977

Physical map of the bacteriophage T5 genome based on the cleavage products of the restriction endonucleases SalI, SmaI, BamI, and HpaI.

N V Hamlett, B Lange-Gufstafson, M Rhoades
PMCID: PMC515927  PMID: 904024

Abstract

A physical map of the bacteriophage T5 genome was constructed by ordering the fragments produced by cleavage of T5 DNA with the restriction endonucleases SalI (4 fragments), SmaI (4 fragments), BamI (5 fragments), and HpaI (28 fragments). The following techniques were used to order the fragments. (i) Digestion of DNA from T5 heat-stable deletion mutants was used to identify fragments located in the deletable region. (ii) Fragments near the ends of the T5 DNA molecule were located by treating T5 DNA with lambda exonuclease before restriction endonuclease cleavage. (iii) Fragments spanning other restriction endonuclease cleavage sites were identified by combined digestion of T5 DNA with two restriction endonucleases. (iv) The general location of some fragments was determined by isolating individual restriction fragments from agarose gels and redigesting the isolated fragments with a second restriction enzyme. (v) Treatment of restriction digests with lambda exonuclease before digestion with a second restriction enzyme was used to identify fragments near, but not spanning, restriction cleavage sites. (vi) Exonucleases III treatment of T5 DNA before restriction endonuclease cleavage was used to locate fragments spanning or near the natural T5 single-chain interruptions. (vii) Analysis of the products of incomplete restriction endonuclease cleavage was used to identify adjacent fragments.

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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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