Phage contaminatio

[karlster]

In article <3754E40A.E0750A0 at mlucom6.urz.uni-halle.de>, Marcus Wernitz
<viacx at mlucom6.urz.uni-halle.de> wrote:

> I have got a problem with my cosmid containing Ecoli.
> All clones seem to be cataminated with phages. In my overnight cultures
> all the cells seem to be lysed.
> When I try to make a plasmid prep I only get smallest amount of DNA.

Marcus,

If you are getting *some* cosmid DNA in your plasmid prep, why not just
re-transform into the appropriate host cells??? If the amount is fleeting
just electroporate.

If you are concerned about carry-over of bacteriophage DNA which might
establish infection following transformation then gel purify the cosmid
DNA and transform as above.

Regards

Karl