Hi Francis, by default both F+ and F- are used in phenix.refine. However, you can request that the average values, Fobs_ave = (F+ + F-)/2 are used instead ("xray_data.force_anomalous_flag_to_be_equal_to=False" keyword). Peter may have more details on how this is handled in twin-refinement. Pavel. On 10/20/2008 7:45 AM, Francis E Reyes wrote:
All
How does phenix.refine handle the twin refinement target when refining against F+/F-? I'm specifically asking for the proper assignment of F+/F- for twin related reflections (e.g. 10.1107/S0907444902021704). My data is currently in P41 with friedel pairs as output by scala.
Thanks
FR
--------------------------------------------- Francis Reyes M.Sc. 215 UCB University of Colorado at Boulder
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