[phenixbb] twinning question

wtempel wtempel at gmail.com
Fri Apr 20 06:42:44 PDT 2012


Did I infer correctly from Padilla & Yeates (2002) Acta Cryst D59:1124-30
that the L-test could indicate twinning even if data were merged in the
apparent higher-symmetry point group?
Wolfram Tempel

On Thu, Apr 19, 2012 at 12:45 PM, Patrick Loll <pat.loll at drexel.edu> wrote:

> Dumb question here: When one runs the various twinning tests (e.g.
> phenix.xtriage), is one meant to use data processed in the higher symmetry
> SG, or the lower symmetry SG?
>
> A concrete example: I can process a data set in a 622 point group w/
> reasonable merging statistics, but an abnormally low solvent content raises
> my suspicions. So do I process as P6, and submit these data to the twinning
> test? Or do I submit the data processed as P622?
>
> Pat
>
>
> ---------------------------------------------------------------------------------------
> Patrick J. Loll, Ph. D.
> Professor of Biochemistry & Molecular Biology
> Director, Biochemistry Graduate Program
> Drexel University College of Medicine
> Room 10-102 New College Building
> 245 N. 15th St., Mailstop 497
> Philadelphia, PA  19102-1192  USA
>
> (215) 762-7706
> pat.loll at drexelmed.edu
>
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