Abstract
The isolation and characterization of an isogenic series of twelve Hfr strains is described. From their points of origin it was concluded that the sex factor integrates at a limited number of sites on the bacterial chromosome. Although the nutritional requirements of these Hfr strains were similar to those of the parent F+strain, it was observed that one group had a markedly slower growth rate. The relevance of these observations to theories on the nature of F+fertility and on the formation of Hfr strains is discussed.
Subject
Genetics,General Medicine
Cited by
78 articles.
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