There seem to be quite a few "rule" followers out there regarding resolution cutoffs. One that I have encountered several times is reviewers objecting to high Rsym values (say 60-80% in the last shell), which may be even worse than using some fixed value of I/sigI. On 3/3/11 9:55 AM, "Ed Pozharski" <[log in to unmask]> wrote: On Thu, 2011-03-03 at 12:29 +0100, Roberto Battistutta wrote: > Does anyone know the origin or the theoretical basis of this "I/sigmaI > >3.0" rule for an appropriate resolution? There is none. Did editor ask you to follow this "suggestion"? I wonder if there is anyone among the subscribers of this bb who would come forward and support this "I/sigmaI >3.0" claim. What was your I/sigma, by the way? I almost always collect data to I/sigma=1, which has the downside of generating somewhat higher R-values. Shall I, according to this reviewer, retract/amend every single one of them? What a mess. Cheers, Ed. -- "I'd jump in myself, if I weren't so good at whistling." Julian, King of Lemurs