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titer of baculoviruses

Stefan Gruenwald grunwald at netcom.com
Tue Apr 25 19:13:12 EST 1995

Dear Herta:

Can you tell us a little bit more about how you obtained this extremely 
high titer and how you determined it. I usually obtain titers up to 
3x10(8) by infecting Sf9 or T.ni cells on plates. However, if you 
infect cells in perfused bioreactors (CellCube, Costar for example), I 
obtained titers up to 3 x 10(9). I have never obtained anything close 
to 10(10) but I would be interested in knowing the exact conditions of 
your experiment.

With best regards

Stefan Gruenwald
(PharMingen, San Diego, CA)

Herta STEINKELLNER (steink at mail.boku.ac.at) wrote: : Hi 
: In my baculovirus working stock I found a titer of more than 10 to the tenth 
: (10 000 000 000) pfu / ml. Does anybody know if it is possible to habe such
: a high titer? 
: The highest titer I found in literature is 5 times ten
: to the eighth (5x100 000 000).
: Thank you for your help
: Herta   IG

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