Hi Theresa, A good place to start when searching for suitable cryo conditions are the tables in these references:
Garman, et al. J. Appl. Cryst. (1996). 29, 584-587. McFerrin, et al. J. Appl. Cryst. (2002). 35, 538-545. hope they help and good luck. Eric __________________ Eric Larson Boehringer Ingelheim Ridgefield, CT Date: Sun, 5 Feb 2012 22:49:25 +0000 > From: "Theresa H. Hsu" <theresah...@live.com> > Subject: Freezing crystal > > Hi all > > Is there a list of conditions to be tried *first* for cryoprotectant? My > crystals diffract at room temperature capillary but no in 30% PEG 400. > Crystals are from 2 M ammonium sulfate. > > Thank you. > > Theresa > >