Fulvio,
We need more info to give advice. First, when you say Rsym is 0.18,
are you talking about in the high res bin or overall? Second, how did
you determine you have twinning? In what space group did you scale your
data? If your data is actually twinned with a high twin fraction, and
you scaled in the apparent SG, not the actual SG, then your Rsym could
be higher and not in the correct SG.
Jon
--
Jonathan P. Schuermann, Ph. D.
Beamline Scientist
NE-CAT, Building 436E
Advanced Photon Source (APS)
Argonne National Laboratory
9700 South Cass Avenue
Argonne, IL 60439
email: schue...@anl.gov
Tel: (630) 252-0682
Fax: (630) 252-0687
On Wed, 2010-10-06 at 11:28 +0200, fulvio saccoccia wrote:
Dear all,
I have a data set collected at 3A resolution. I processed the data but I
had to cut the resolution at 3.6A for the high value of Rmerge (at 3.6A
it is 0.18). After scaling and MR I realized that my data were twinned.
This is my question: can I reprocess all the data set using all the
reflections up to 3A resolution even if the Rmerge is very high, knowing
that data are twinned? and also, is the Rmerge invalidate by the twinning?
