On 02/17/2011 09:35 PM, Peter Grey wrote:
Dear CCP4 and XDS users,
I have a P21 case with some strange ratios in the cell dimensions : a, b=a,
c=1.5a, 90, 105, 90. The native patterson shows a strong peak (40% of
origin) at (x,0.5,0) indicating some pseudo symmetry. Such cell dimension
and peak prompted me to think that the actual space group is side-centered.
However in XDS any choice of such space groups receives bad scores. Could
XDS be wrong in such a case ?
Thank you in advance for your time,
Peter.
othercell doesnt think there is anything possible except P1.
Of course you wont be able to tell if it is P21 or P2; the translation
vector itself will generate absences along 0 k 0.
Eleanor
