[ccp4bb] very low R factor for twin refinement

2011-02-10 Thread Patskovsky Yury
Dear all, Twin refinement has yielded Rwork/Rfree values of about 0.10/0.12 for a nice quality 1.8A dataset (Rmerge 6%, space group I4, twin fractions 0.6/04) and almost the same R/Rfree (0.095/0.115) for another 1.5A nice quality data set (Rmerge 6%, space group I4, twin fractions

Re: [ccp4bb] very low R factor for twin refinement

2011-02-10 Thread Patskovsky Yury
the first crystal and refine against the second crystal. regards Garib On 10 Feb 2011, at 20:14, Patskovsky Yury wrote: Dear all, Twin refinement has yielded Rwork/Rfree values of about 0.10/0.12 for a nice quality 1.8A dataset (Rmerge 6%, space group I4, twin fractions 0.6/04

Re: [ccp4bb] Rfree into an existing mtz...

2007-05-31 Thread Patskovsky Yury
Hi James, F2mtz will do it. On Thu, 31 May 2007, James Pauff wrote: Good day all, What is the best means of getting a freeR column into an existing mtz file? I've noticed the Edit MTZ command bar in CCP4, but there are other options (such as conversion to XPLOR and then back to MTZ) that