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. 1978 Feb;133(2):916–924. doi: 10.1128/jb.133.2.916-924.1978

Fine cleavage map of a small colicin E1 plasmid carrying genes responsible for replication and colicin E1 immunity.

A Oka
PMCID: PMC222104  PMID: 342515

Abstract

A small plasmid (pAO2, 1 megadalton) carrying genes responsible for replication and colicin E1 immunity has been constructed from colicin E1 plasmid (A. Oka, K. Sugimoto, and M. Takanami, Proc. Mol. Biol. Jpn., p. 113-115, 1976). pAO2 DNA was cleaved into unique fragments with seven restriction endonucleases (R.HaeII,R.HaeIII,R.HapII,R.HhaI,R.AluI,R.HgaI, and R.HinfI). R.HaeII cleaved pAO2 DNA at two sites, R.HaeIII at four sites, R.HapII at nine sites, R.HhaI at eight sites, R-AluI at nine sites, R.HgaI at two sites, and R.HinfI at four sites, respectively. The order of HaeIII fragments of pAO2 was deduced from the physical map of colicin E1 plasmid previously reported (A. Oka and M. Takanami, Nature (London) 264:193-196, 1976). HapII, HhaI, and AluI fragments of pAO2 were assigned by analyzing overlapping sets of fragments arising upon digestion of individual HaeIII fragments with one of R.HapII, R.HhaI, or R.AluI, and upon their reciprocal digestion. The cleavage sites for R.HaeII, R.HgaI, and R.HinfI were localized on HapII, HhaI, and AluI fragments by combined digestion. On the basis of these data and estimates of the size of each fragment, a fine cleavage map of pAO2 was constructed.

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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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