Hello,
I would suggest to use several tools (in addition to Phenix's) - CCP4's
detwin, the plots generated by truncate before detwinning, the Yeates
twinning server and there might be others - to get a good idea of what
the twinning fraction is.
Here we've had success using CCP4's detwin to "detwin" diffraction data.
The resulting mtz file is not equivalent to an mtz file containing data
recorded from an untwinned crystal - this detwinning operation is not a
perfectly accurate operation... In our case we used the estimate of the
twinning fraction obtained from Phenix (which was lower).
HTH,
Fred.
On 26/03/13 15:45, Liang Zhang wrote:
Hi, All,
I got a set of P2(or P21) data for MR. However, the Phenix-Xtriage
indicated that it could be a pseudo-merohedral twinning. Does anyone
know how to deal with such kind of twinning problem? Thanks.
Best,
Liang
--
Fred. Vellieux (B.Sc., Ph.D., hdr)
ouvrier de la recherche
IBS / ELMA
41 rue Jules Horowitz
F-38027 Grenoble Cedex 01
Tel: +33 438789605
Fax: +33 438785494
