On 25 May 2021, at 10:14, Phil Evans <[email protected]> wrote:

I wonder whether our common metrics for assessing resolution are more optimistic for twinned data compared to untwinned - has anyone investigated that? Fewer weak reflections will reduce any sort of R-factor, but i’m not sure of its effect on CC(1/2)

There is always the question of what we mean by “the resolution of the data"

Phil

On 24 May 2021, at 22:45, Thomas, Leonard M. <[email protected]> wrote:

Hello,

I have been working on a structure for a very long while.  We have a number of data sets with the good ones mostly around the 3.1-3.2 A range.  I do have a determination of the structure but would like to see if I can get the structure determined with a slightly higher resolution data set at around 2.7 A.  Problem is the 2.7 data is twinned.  Are there settings in Phaser to handle twinned data or is the twinning only handled during refinement?  

Thank you for any advice, outside of forgetting about the twinned data.  

Len 


Leonard Thomas, Ph.D.
Macromolecular Crystallography Laboratory
Oklahoma COBRE in Structural Biology
Price Family Foundation Institute of Structural Biology
University of Oklahoma
Department of Chemistry and Biochemistry
Stephenson Life Sciences Research Center
101 Stephenson Parkway
Norman, OK 73019-5251
Office: (405)325-1126
[email protected]
http://www.ou.edu/structuralbiology/cobre-core-facilities/mcl

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