[ccp4bb] iMosflm: How to change gain and exclude frames

2016-12-03 Thread Alex Lee
Dear CCP4bb members, I am new to iMosflm data processing (I use HKL2000 but I really want to learn iMosflm). After automatic index, cell refinement and integration in iMosflm, I got 2 warnings. 1. Error in detector gain. BGRATIO of my data lies outside the 0.7 to 1.3 range (mine is 0.64)

Re: [ccp4bb] XDS questions

2016-12-03 Thread Jan Stransky
I had some cases, when path INTEGRATE.HKL -> Aimless gave data, from which it was not possible to solve structure by Phaser. It looked like structure solved, but then I got 45-50% Rwork/free. There were no problems with XDS_ASCCI.HKL -> Aimless (Not scale, just merge) path. Jan On 11/24/2016

Re: [ccp4bb] To win or not twinning?

2016-12-03 Thread John R Helliwell
Dear Napo, I imagine this article, although rather wide ranging in its content, will be of assistance:- http://journals.iucr.org/d/issues/2005/06/00/ic5050/ More generally you might consult Chayen, Helliwell and Snell "Macromolecular Crystallisation and Crystal Perfection" Published by OUP and

Re: [ccp4bb] Rotation

2016-12-03 Thread John R Helliwell
Dear David, The following will be of interest:- *J. Chem. Soc., Faraday Trans.*, 1993, *89*, 2667-2675 (*DOI: *10.1039/FT9938902667 ) and Y P Nieh PhD Thesis 1997 available at :- http://ethos.bl.uk/Home.do [ie just search on his name and the pdf is available.] All best wishes, John On Fri, Dec