Problem with X-gal

[Duncan Clark]

Historians believe that in newspost 
<mailman.417.1143822533.16885.methods at net.bio.net> on Fri, 31 Mar 2006, 
Siddhartha Parida <sidharth4 at gmail.com> penned the following literary 
masterpiece:
>How long can a X-gal stock solution be active at -4C ? do i have to
>prepare fresh stock solution just before use ?

If the solution looks yellow, then it's too old.

Easily store for a year at -20C.

Duncan
-- 
I love deadlines. I especially like the whooshing noise they make as
they go flying by.

Duncan Clark
GeneSys Ltd.