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.
