[Chimera-users] phenix map not reading in chimera

Elaine Meng meng at cgl.ucsf.edu
Wed Dec 2 14:21:02 PST 2009

Hi Geoffrey,
It's probably not the header per se, but the format.  Chimera  
interprets files with the .map suffix as CCP4 density map format,

but that is not necessarily the format written by phenix.refine.  I'm  
looking online and it says phenix.refine writes ASCII X-PLOR format.   
In that case, you might try renaming the file with the .xplor suffix  
and then try opening it in Chimera.
I hope this helps,
Elaine C. Meng, Ph.D.
UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco

On Dec 2, 2009, at 1:46 PM, Geoffrey Feld wrote:

> Greetings,
> I'm trying to make a figure showing off my best density from a 2Fo- 
> Fc map I generated using phenix.refine. The output file has a .map  
> suffix. However, Chimera gives an error about the header, which I've  
> included: MRC header value nsymbt (538976288) is invalid. How do I  
> give Chimera a map with a header it can read?
> Thanks,
> -- 
> Geoffrey K. Feld

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