help X-gal

[ronald goto]

has this happen to anyone before? our stock solution of X-gal is 100 ug/ml 
in DMF and we dilute as we need it,  well a new student dituled it in water, I 
can not see any ppt but it did freeze solid at -20 C (clue for me it wasn't in 
DMF) question is? is it any good??? thanks in advance, post or e-mail. Sorry 
about the first post, hands are quicker than the brain.

Ronald Goto
Mol Biochem
rgoto at smtplink.coh.org