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Re: [ccp4bb]: R factor
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Dear Zee,
I had a similar problem last year, with a crystal that seemed to have P212121
symmetry, but the structure wouldn't refine, despite having reasonable maps. It
turned out that the true spacegroup was P21 with beta angle of 90. I recommend
that you consider that you may have an incorrect spacegroup, or possibly twinned
data.
Best regards,
Susan Heffron
"Dr.Zulfiqar Malik" wrote:
>
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> *** CCP4 home page http://www.ccp4.ac.uk ***
>
> Hi, Friends,
> Even after many refinements I am not able to get the Free Rfactor lower than
> 46%. Map looks good as well as no much green or red density on it.Fitting
> looks quite promossing and nice. RMS distance as well as angles are also below
> Avg.
>
> I will appreciate your answers.
> Zee.
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Susan Heffron
Dept. of Physiology and Biophysics
University of California, Irvine
Irvine, CA 92697-4560 U.S.A.
phone: (949) 824-4625
FAX: (949) 824-8540
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