Non-alpha complementation vector

JSUPolek jsupolek at
Wed Apr 24 16:10:01 EST 2002

Does anyone know of a high copy number vector that does not contain the
truncated lacZ gene?  I've been using pBR322 and I can't visualize expression
of my insert, and I think it's due to the low copy per cell.  I know about
increasing plasmid numbers by using chloramphenicol, but I need the expression
on a plate.

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