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Mol Gen Genet. 1990 Oct;224(1):152-4.

High efficiency introduction of plasmid DNA into glycine treated Enterococcus faecalis by electroporation.

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Department of Microbiology and Immunology, University of Oklahoma, Oklahoma City 73190.


A highly efficient electroporation system for Enterococcus faecalis was developed by systematically optimizing different parameters. One parameter found to be particularly critical for electroporation was cultivation of E. faecalis in medium containing a high glycine concentration, prior to electroporation. Osmotic stabilization of cells with 0.5 M sucrose was also found to be critical during glycine treatment. 10(6) transformants per microgram of plasmid DNA were consistently obtained within 48 h. Electrocompetent preparations of E.-faecalis could be stored at - 70 degrees C without loss of competence.

[Indexed for MEDLINE]

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