Covert fi − R Factors in fi − R + Strains of Bacteria
- 1 February 1969
- journal article
- research article
- Published by American Society for Microbiology in Journal of Bacteriology
- Vol. 97 (2), 780-786
- https://doi.org/10.1128/jb.97.2.780-786.1969
Abstract
The presence of an fi− sex factor can be detected by propagation of the I-specific phage If1. By use of this method of detection, a high proportion of strains with fi+ R factors were shown also to carry an fi− factor which was frequently a second R factor. In some doubly R+ strains, the fi+ and the fi− factor were observed to be transferred independently at conjugation.Keywords
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