Re: [ccp4bb] Negative CCanom

2015-07-17 Thread Seijo, Jose A. Cuesta
...since he was not using XDS... Oooops! My bad! I just recognized the phenomenon and assumed it to be from XDS. That explains the different column names. I'll keep my eyes open next time. Cheers, Jose. Jose Antonio Cuesta-Seijo, PhD Carlsberg Laboratory Gamle

Re: [ccp4bb] Negative CCanom

2015-07-17 Thread Keller, Jacob
>No, it's just merohedral - the true and the apparent spacegroup belong to the >same pointgroup. Even if it were pseudo-merohedral it would be a superposition of reflections, with addition of their intensities. Well, if there are several apposed crystals as hypothesized before, where they are c

Re: [ccp4bb] Negative CCanom

2015-07-17 Thread Seijo, Jose A. Cuesta
Going back to the original discussion on XDS producing negative CCanom, I am not sure that this is the result of some crystal artifact. I just checked many datasets from the last years and in all cases virtually for every every resolution shell, XDS reports a negative CC anom. Please note that