Here is an example that is is not cryocongelation but spacegroup change
upon cooling :

Garavito RM, Jenkins J, Jansonius JN, Karlsson R, Rosenbusch JP. X-ray
diffraction analysis of matrix porin, an integral membrane protein from
Escherichia coli outer membranes. J Mol Biol. 1983 Feb 25;164(2):313-27. PubMed PMID: 6302273.

Daniel


Le 30/09/2010 16:56, Daniel Bonsor a écrit :
There are a couple of papers...

Acta Cryst. (2010). F66, 346-351
Crystallization and X-ray diffraction studies of cellobiose phosphorylase from 
Cellulomonas uda

The space group was originally P21. During collection the crystal moved out of 
the beam (and possibly the cyrostream). Upon recentering,  the space group was 
found to be P212121

Acta Cryst. (1998). D54, 448-450
Crystallization and preliminary X-ray analysis of thiaminase I from Bacillus 
thiaminolyticus: space group change upon freezing of crystals

At room temperature the space group was P212121 but upon freezing the space 
group changes to P21212


Hope this helps.


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