U12201 at U12201 at
Thu Jun 29 07:49:48 EST 1995

I would recommend using a very clean prep of ethylene glycol
instead at a final of 30-50% (Pierce has good clean quality!)
EG gives much lover viscosity than glycerol at -20.
But beware the many crummy grades of glycerol and ethylene glycol
on the market - these chemicals have large technical uses and
I believe only Pierce offers the extra clean stuff!!

In article <3stjlc$f13 at>, william at (William Sun) says:
>Anyone know the percent of glycerol in most of the commercial restriction
>enzymes?  I want to add glycerol to my protein samples to prevent
>freezing at -20 C. Thanks for the info.
>William Sun, Ph.D.                      Phone: (213)740-3406
>Hedco Neuroscience Building             Fax: (213)740-5687
>University of Southern California       Pager: (310)499-8670

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