Generalized Transduction of Bacteria
Transduction was discovered by Zinder and Lederberg in 1952 when they were looking for an E. coli type conjugation system in Salmonella typhimurium. A mixture of two cultures of auxotrophic mutants of this bacterium differi…Read More
Features of interrupted mating between Hfr x F– cells of E. coli
The important features of interrupted mating between Hfr x F– cells of E. coli are briefly mentioned below:
(a) Transfer of Hfr chromosome to P cell begins at a particular point on chromosome determined by the site of…Read More
The F-Plasmid
F-Plasmid:
The F-plasmid of E. coli is a self-transmissible, low copy-number extra-chromosomal genetic element mediating its own transfer. The transfer process requires products of a good number of genes (about 40) which a…Read More
The process of Bacterial conjugation
The Conjugation Process:
An F-plasmid gene confers the ability to produce long, hair-like appendages, known as sex pili (F-pili). These appendages establish contact with F-cells which are without sex-pili. The sex pilus is…Read More
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