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The nature and incidence of conjugation factors in Escherichia coli

Published online by Cambridge University Press:  14 April 2009

Elinor Meynell  and
Naomi Datta
Elinor Meynell
Affiliation:
M.R.C. Microbial Genetics Research Unit, Hammersmith Hospital, London, W.12
Naomi Datta
Affiliation:
Postgraduate Medical School, Ducane Road, London, W.12
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The sex factor F is itself exceptional among conjugation factors in being freely expressed in all the bacteria of a culture, while related factors which are largely unexpressed are widespread. These can be recognized by the presence of a small proportion of cells sensitive to phage specific for F+ bacteria, and may sometimes constitute the conjugation factors associated with colicinogeny. Moreover, F itself can mutate to the repressed state so that derivatives of E. coli K12 which appear F− include some in which F is still present but rarely expressed.

Type
Short Papers
Information
Genetics Research , Volume 7 , Issue 1 , February 1966 , pp. 141 - 148
Copyright
Copyright © Cambridge University Press 1966

References

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