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Dear Li, > On Wednesday 05 July 2006 14:18, Eleanor Dodson wrote: > I dont think that sort of Rfactor/Rfree difference at 2.7A is very > surprising.. I disagree - although not surprising at this resolution, this gap in Rfactors is almost certainly a sign of overfitting. If I were to referee a manuscript with this sort of statistics I would encourage the authors to reconsider the parametrisation - either by tightening the NCS, if there is any, or by reducing the degrees of freedom for the description of the thermal motion (i.e. use TLS, or one-B-shift per residue) or simply tightening the geometry. Good luck with your refinement! Pietro -- Pietro Roversi - Laboratory of Molecular Biophysics - Biochemistry Dept. University of Oxford - South Parks Road - Oxford OX1 3QU - England, UK Tel. 0044 (0)1865 275385 - Fax. 0044 (0)1865 275182 http://biop.ox.ac.uk/www/lea/website/index.htm
