Can a linearized Plasmid DNA ligate inside the E.coli?

Nagarajan Lakshmanan lakshmanan1 at
Mon Nov 11 14:20:47 EST 2002

Dear All,

I have digested my plasmid with Xho1 and verified with agarose gel 
and gel purified a single band using Qiagen gel purification kit. 
When I transformed this DNA into  DH10B, by electrophoration, I got 
several colonies.  FYI, I do not dephosphorilate my vector.  I think 
the linearized vector is ligating inside the E.coli cells.  Could 
this be possible?  I would appreciate your thought and experience on 
this.  Thanks.

Naga Lakshmanan
Lawrence Livermore National Lab.
Biology & Biotechnology Research Program
L-441, Building 366
Livermore, CA 94550
Phone: (925) 422 5783

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