Hi,
Reflections related by twin operator(s) should have
same FreeR flag. FREERFLAG program in CCP4 takes care of
it by default.
http://www.ccp4.ac.uk/html/freerflag.html
> if the keyword NOTWIN is not set, all reflections that are equivalent
> by the symmetry of the point group of the twin lattice (assuming the
> data is twinned), obtain the same flag. This includes both the
> possibility of merohedral and pseudomerohedral twinning.
Best regards,
Takanori Nakane
(2014/07/07 7:31), Yamei Yu wrote:
> Hi all,
>
> Is there anything that needed to pay attention to while choosing Rfree set for twinned data set? Or we can choose Rfree set randomly as untwined data set?
>
> Thanks!
>
> Best wishes!
>
>
> ************************************************
>
> Yamei Yu
>
>
|