Dear Nicola the most thorough discussion I have seen regarding recommendations on cutoffs (or at least ways to think about them) for such crystallographic data indicators can be found in:
Assessing and maximizing data quality in macromolecular crystallography P Andrew Karplus and Kay Diederichs Current Opinion in Structural Biology 2015, 34:60–68 http://dx.doi.org/10.1016/j.sbi.2015.07.003 best wishes Savvas ---- Savvas Savvides VIB-UGent Center for Inflammation Research Dept. Biochemistry & Microbiology, Ghent University Technologiepark 927, B-9052 Ghent (Zwijnaarde), Belgium +32 (0)472 928 519 (mobile) ; +32 9 331 36 60 (office) ; Skype: savvas.savvides_skype http://www.vib.be/en/research/scientists/Pages/Savvas-Savvides-Lab.aspx <http://www.vib.be/en/research/scientists/Pages/Savvas-Savvides-Lab.aspx> > On 29 Aug 2017, at 16:05, Nicola Evans <nicola.1.ev...@kcl.ac.uk> wrote: > > Hello all, I have heard at several CCP4 meetings and also at Diamond training > that a good "cut off" for CC(1/2) is around 0.3 and I/sig(I) is 0.2, but I am > struggling to find any journal references to say this (other than > demonstrating the merits of CC(1/2) over Rmeas). > > Can anyone point me in the right direction? Thanks all! > > Nicola
