| Quick navigation: | Home | Site Map || References | Biography || Copyright | Other copyright | Contact us | Advert | | |
Re: [ccp4bb] model refinement (corrections, apologies!) |
||
- Protein crystallographyMain steps:- Protein purification- Crystallisation Special:- Programs for crystallography- X-ray detectors Basic tutorials:- Chemistry- Protein - Peptide - Amino Acids Xtal community:- CCP4BB |
CCP4bb navigationCCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999Subject: Re: model refinement (corrections, apologies!) From: Eleanor Dodson ccp4 {- at -} YSBL {- dot -} YORK {- dot -} AC {- dot -} UK Date: 2010-06-24 Rfactors can vary a lot for equally good results it seems. You need to look at your Rfactor v resolution to see if there are any problems - ice rings? low resolution stuff? etc etc Have you used TLS sensibly - this can help.. etc etc But if the maplooks good you should be happy. Eleanor Tim Gruene wrote: > On Fri, Jun 18, 2010 at 09:14:28AM +0000, atul kumar wrote: >> Dear all >> >> [...] these. Other than that, there are no major issues. I was just >> wondering if the present R-factor values seem alright for a 1.9 ang data, >> which many of you have suggested it does? >> >> Atul > Yes, it does. The R-values are not the numbers you should look at to decide > whether or not model building and refinement have finished. It's the map and > e.g. the molprobity output you should look at. > Tim > >> >> On Fri, Jun 18, 2010 at 7:39 AM, atul kumar >> >>> Dear all >>> I am trying to solve structure of data set at 1.9 A,r merge 9.3,it belongs >>> to space group P3221 unit cell 160.78 157.32 135.62 90.0 90.0 90.0,i has no >>> NCS ,i did tls refinement as well but after water addition the r factor and >>> r free is stucked at 22 and 25 respectively.suggestions are requested for >>> the same. >>> >>> regards >>> >>> Atul Kumar >>> > CCP4bb navigationCCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999 |
|
| ProteinCrystallography.org: Copyright 2006-2010 by Quid United Ltd |