Following up baffling cloning results

[Karthik Aghoram]

Thanks to all who responded!  

FYI:  

I found that STBL-2 cells from Invitrogen/Gibco (absolutely no
affiliation whatsoever) are Kan-sensitive.  In addition they carry the 
mutation that will stablize inverted repeats (a la SURE cells).  

Regards.