Re: [ccp4bb] resolution

2019-07-04 Thread graeme.win...@diamond.ac.uk
Pavel, Please correct if wrong, but I thought most refinement programs used the weights e.g. sig(I/F) with I/F so would not really have a hard cut off anyway? You’re just making the stats worse but the model should stay ~ the same (unless you have outliers in there) Clearly there will be a poi

Re: [ccp4bb] resolution

2019-07-04 Thread Pavel Afonine
Hi Sam Tang, Sorry for a naive question. Is there any circumstances where one may wish > to refine to a lower resolution? For example if one has a dataset processed > to 2 A, is there any good reasons for he/she to refine to only, say 2.5 A? > yes, certainly. For example, when information content

Re: [ccp4bb] resolution

2019-07-04 Thread graeme.win...@diamond.ac.uk
Hi Sam, If you have good data to 2A, then I cannot imagine throwing away a significant fraction of it (there are lot of spots from 2.5-2A) will make your model better Suggest reading http://scripts.iucr.org/cgi-bin/paper?S0907444913001121 All best Graeme On 5 Jul 2019, at 06:43, Sam Tang mai

[ccp4bb] resolution

2019-07-04 Thread Sam Tang
Hello everyone Sorry for a naive question. Is there any circumstances where one may wish to refine to a lower resolution? For example if one has a dataset processed to 2 A, is there any good reasons for he/she to refine to only, say 2.5 A? Thanks! Sam Tang ##

[ccp4bb] Postdoctoral position on structure of amyloid fibrils (cryo-EM/X-ray)

2019-07-04 Thread Matthias Schmidt
Postdoctoral Position at the Institute of Protein Biochemistry, Ulm University (Germany), Group Prof. Dr. M. Fändrich The Institute of Protein Biochemistry (_https://www.uni-ulm.de/nawi/nawi-pbc.html_) investigates the molecular basis of amyloid diseases, such as Alzheimer's disease and system