evaluation of sonication
blackhole at abuse.plus.com
Thu Apr 6 04:05:02 EST 2006
Historians believe that in newspost
<1144233782.131152.114780 at t31g2000cwb.googlegroups.com> on Wed, 5 Apr
2006, "cheetah.zao at gmail.com" <cheetah.zao at gmail.com> penned the
following literary masterpiece:
>Does anyone know some quick methods to check whether E.coli cells are
>oversonicated or not, since it is tricky to balance protein denaturing
In 28 years I've never run up against over-sonicating. Just keep
everything on ice and by trial and error work out how long you can
sonicate for in one burst without taking your extract above temperature
X (where you decide what X is). Allow to cool on ice then repeat and so
on until cells are broken.
This can take at least an hour or so of total time if you are doing 6
bottles of 500ml extract with three to four 5minute stints of
sonication using a 3/4 inch probe and 350W.
I love deadlines. I especially like the whooshing noise they make as
they go flying by.
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