On 26 December 2010 09:49, Pavel Afonine <pafonine at lbl.gov> wrote: > Hi Keitaro, > >> Currently, R-work and R-free are 22%, 24%, respectively (with >> twin_law) at 2.5 Angstrom resolution. If the twin mates of the free set are members of the working set, this is what can happen. phenix.refine selects the proper test set. HTH Peter