Tom Knight tk at suspiria.ai.mit.edu
Fri Jan 3 18:42:44 EST 2003

Invitrogen uses the ccdB gene which is toxic in E. coli as a way of
doing positive selection of insertions in its cloning systems.  If you
look at their vector sequences you can find the insertion, and you
could easily get a copy of the gene from any one of a number of their
vectors.  I think they even sell a resistant strain of coli, so that
you can grow it.

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