Protein toxity in E.coli

AL R. PLUMMER aplummer at
Fri Jun 27 11:00:00 EST 1997

Our lab is trying to overexpress and isolate a rather large yeast (S.
cerevisiae) protein in E.coli.  The gene is ca. 4 kb and encodes a protein
of 1,433 a.a.  We transformed DH5alpha with a plasmid containing the 
gene, but are unable to see it.  Also, when the expression is induced
(IPTG), the E.coli become sick (grow slower).  Does anyone have any 
experience expressing large or toxic proteins in E.coli?  Any help
would be greatly appreciated.

-Al (plummer at

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