Re: [ccp4bb] refmac vs shelx refinement

2007-03-07 Thread George M. Sheldrick
SHELX does not need a parameter to control the relative weights of restraints and X-ray data, it is performed automatically. However you can change the restraint esds, either individually or globally using DEFS, though the default values are generally OK. There is bound to be some difference in

[ccp4bb] refmac vs shelx refinement

2007-03-06 Thread Artur Matysik
Dear CCP4BB users; Due to mixed state of a ligand conformation I wanted to use shelx, to refine it correctly at the end point of refinement. My problem is, that I do not know how to control geometry in Shelx. After Shelx refinement, my bonds are very tight (rms 0.008), angles loose (rms ~1.9), R