Is that necessary?
Eleanor

J. Preben Morth wrote:
hi
remember to reindex your data to P21212 in case you used Phaser to search all 
alternative orthorhombic SG's and it found P22121
Preben
On 03/10/2010, at 04.56, Jack Russel wrote:

Hi all,

I have collected a data at 2.9 Å and the solved the structure using phaser . the space group comes to be P2 21 21. There are 4 molecules in Assymetric unit and an octamer is generated according to the symmetry. But after repeated rounds of rigid body refinement with REFMAC5 and model building with coot the R factor had been struck at 40% and R free at 50%.
So my first question is whether my solution after phaser is correct. And if it 
is how can i lower the  R factor and Rfree.

The second question is it possible to have such a large difference between R 
factor and R free.

Thanks in advance







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