> 
> 
> For structures with a small number of reflections, the statistical noise 
> in the 5% sets can be very significant indeed. We have seen differences 
> between Rfree values obtained from different sets reaching up to 4%. 

This is very intriguing indeed!
Is there something specific in these structures that Rfree differences depending
on the set used reach 4%? NCS? Or the 5% set having less than ~1000-1500 
reflections?

It would be indeed very interesting if there was a correlation there!

A.

> 
> Ideally, and instead of PDBSET+REFMAC we should have been using simulated 
> annealing (without positional refinement), but moving continuously between 
> the CNS-XPLOR and CCP4 was too much for my laziness.
> 
> All the best,
> Nicholas
> 
> 
> -- 
> 
> 
>          Dr Nicholas M. Glykos, Department of Molecular Biology
>     and Genetics, Democritus University of Thrace, University Campus,
>  Dragana, 68100 Alexandroupolis, Greece, Tel/Fax (office) +302551030620,
>    Ext.77620, Tel (lab) +302551030615, http://utopia.duth.gr/~glykos/

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