Plasmid Curing

benedik at benedik at
Fri Jan 13 11:25:32 EST 1995

In article <01HLR6J0LXKQ000CXC at>

> Fellow micronetters, other than ethidium bromide, how does one cure a strain of
> its plasmids, when the plasmids lack antibiotic resistance markers to start
> with?  
> Your help is very much appreciated.
> David
> David J. McGee

How do you know the plasmid is there to start with? 

That really isn't a rhetorical question. But basically you need to grow
cultures up under curing conditions, such as with acridine orange or
ethidium bromide, and then test lots of individuals colonies for the
plasmid. However it is that you know the plasmid is present is how you
need to test for it. This could be resistance or sensitivity to some
phage, ability to mate with 
some other plasmid, or just run lots of gels and look for plasmid DNA.

Michael Benedik               benedik at
Biochemical Sciences
University of Houston
Houston, TX 77204-5934

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