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Interactions between Colicinogenic Factor B and F-Type Factors: Isolation of a Mutant F-lac Factor Insensitive to the Effect of Colicinogenic Factor B

Authors
Journal
Genetics
0016-6731
Publisher
The Genetics Society of America
Publication Date
Keywords
  • Investigations

Abstract

An extrachromosomal factor, colicinogenic factor B (colB) inhibits expression of fertility functions of various F-type factors in strains of E. coli K12. Mutant F-lac factors simultaneously became insensitive to all the effects of colB as well as to similar actions exerted by a resistance transfer factor, R fi+. This suggests that a common site or activity necessary for the expression of several F functions is affected by products of both colB and R fi+.

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