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Help with Jurkat sonication - (Jul/12/2006 )

Can anybody tell me how I can obtain a sonicate in jurkat cells about 300-500pb?Normally I obtaines too smear about 1kb. I sonicated 6x10" in medium power position, and I use about 15 million of cells in 400ul. Thanks

-Gonzo-

QUOTE (Gonzo @ Jul 12 2006, 04:58 AM)
Can anybody tell me how I can obtain a sonicate in jurkat cells about 300-500pb?Normally I obtaines too smear about 1kb. I sonicated 6x10" in medium power position, and I use about 15 million of cells in 400ul. Thanks


What kind of buffer do you sonicate in?

-KPDE-

QUOTE (KPDE @ Jul 12 2006, 03:48 PM)
QUOTE (Gonzo @ Jul 12 2006, 04:58 AM)

Can anybody tell me how I can obtain a sonicate in jurkat cells about 300-500pb?Normally I obtaines too smear about 1kb. I sonicated 6x10" in medium power position, and I use about 15 million of cells in 400ul. Thanks


What kind of buffer do you sonicate in?


I used a buffer that contains 50mM Tris-Cl pH 8,10mM EDTA,1% SDS and protease inhibitors.

-Gonzo-