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Updated: Jun 3, 2026

A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues
Published on: February 19, 2019
Bacterial transformation (kushner method)
1Department of Microbiology, University of Surrey, Guildford, Surrey.
Abstract:
The principle of this procedure is very similar to that of the standard calcium chloride method, (see Chapter 34 ) i.e., exponential phase cells are harvested and washed with a solution containing divalent cations. This renders the cells competent, which simply means they are now able to take up DNA from the solution. After mixing the competent cells with the DNA, they are subjected to a heat shock to promote the uptake of DNA, presumably by affecting the physical state of the lipids in the membrane.
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