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The sex factor of colicin factor E1a

Published online by Cambridge University Press:  14 April 2009

G. G. Meynell and
A. M. Lawn
G. G. Meynell
Affiliation:
Guinness-Lister Research Unit and Department of Electron Microscopy, Lister Institute of Preventive Medicine, Chelsea Bridge Road, London, S.W.1
A. M. Lawn
Affiliation:
Guinness-Lister Research Unit and Department of Electron Microscopy, Lister Institute of Preventive Medicine, Chelsea Bridge Road, London, S.W.1
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The sex factor of colE1a appears related to Ib, the sex factor of colIb, by each of three criteria: mutual inhibition of epidemic spread, antigenic structure of the sex pilus and susceptibility to I phage. The failure of each factor to spread in cultures carrying the other implies that donor ability is subject to a cytoplasmic repressor. Unlike two colI factors, colE1a and colIa (or Ib) can co-exist to give a doubly colicinogenic strain.

Information

Type
Short Papers
Information
Genetics Research , Volume 10 , Issue 3 , December 1967, pp. 323 - 325
Copyright
Copyright © Cambridge University Press 1967

References

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