Segregation into and replication of plasmid deoxyribonucleic acid in chromosomeless segregants of Escherichia coli.

@article{Inselburg1970SegregationIA,
  title={Segregation into and replication of plasmid deoxyribonucleic acid in chromosomeless segregants of Escherichia coli.},
  author={Joseph Inselburg},
  journal={Journal of bacteriology},
  year={1970},
  volume={102 3},
  pages={642-7}
}
The progeny cells of Escherichia coli strain P678-54, which normally do not contain deoxyribonucleic acid (DNA), were found to carry DNA when the parental cell carried colicin factor E1 (Col E1). The DNA found in the normally DNA-less segregants was shown to be Col E1 DNA, which is present primarily as a covalently closed circular molecule that can undergo more than one complete cycle of replication. 

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Genetic studies on bacteriophage P 1

W. F. Studier
Virology • 1968

MINIATURE escherichia coli CELLS DEFICIENT IN DNA.

Proceedings of the National Academy of Sciences of the United States of America • 1967

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