Self-made TOPO cloning

Tobias Straub tobias.straub at
Sat Aug 29 16:50:15 EST 1998

In article <35E6689E.3704 at> , Marcus Wernitz
<viacx at>  wrote:

>But does the buyable calf-thymus topoisomerase bind to the binding sites
>like it was originally described for the Vaccinia topoisomerase?

the difference between vaccinia virus topI and the mammalian topI is its
sequence specificity for 5'-(C/T)CCTT-3' with topI being covalently linked
to the 3'-T. mammalian topI cleavage is almost unspecific.
Another question: is the plasmid in the cloning kit already activated with


Tobias Straub
Medizinische Poliklinik, University of Wuerzburg
Klinikstrasse 6-8
97072 Wuerzburg
Phone: +49-931-2017085
Tobias.Straub at

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