[ccp4bb] Two cells, one crystal

[SIPPEL,KATHERINE H]

Hi all,

I work on a protein that has two know space groups at the same 
condition. One is P21 with 1 molecule in the ASU (small cell) and 
the other is P21 with 2 molecules in the ASU (large cell with 
pseudo-translational symmetry and is a giant pain in the butt to 
deal with). I was shooting a crystal today and the first image was 
the large cell, as it is a large crystal and I was feeling lazy so 
I just translated the crystal in the beam and collected another 
image and it was the small cell. I looked around but there doesn't 
seem to be any literature covering this topic.

Is this a common phenomenon or should I be intrigued?

Thanks in advance for the help,

Katherine

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