you can use the protocol published in FEMS microbiol lett 128 (1995)
201-206 by Fred Kippert.
1. To 10-200 micro litters of cells you add 600 microliters of Z buffer
with 0.2% Sarcosyl (Sodium Lauroyl Sarcosinate).
2. Incubate for at least 30 minutes.
3. Add 150 microliters of ONPG 4 mg/ml.
4. You can stop the reaction by adding 400 microliters of Na2CO3 1.5M.
Thats all. Simple and quick.
On Thu, 12 Dec 1996 mike at ncsu.edu wrote:
> I would appreciate your sharing your favorite protocol for liquid
> B-gal assays with me. I am using PJ69.4a for a 2-hybrid screen and
> will potentially being doing many at one time (or hopefully a few). I
> have tried grinding the cells with glass beads and then incubating the
> extract with X-gal and Z buffer but it didn't work out (have yet to
> repeat this). Just wondering if anyone knows of a good way to do
> Mike Faughn
>> Dept. Genetics, NCSU