[Chimera-users] Electron density maps

Elaine Meng meng at cgl.ucsf.edu
Fri May 30 09:59:36 PDT 2014

Hello Luis,
MTZ files contain crystallography data, but not in the form of a density map. Chimera doesn't read or convert MTZ.  You would need to use another program to do the conversion to a density map; see this previous post for more details:


Unfortunately the third link in that post is now broken.  I don't know if there is a newer URL for that web server.
Elaine C. Meng, Ph.D.                       
UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco

On May 29, 2014, at 9:22 PM, lecan wrote:

> Hello Chimera's users,
> I would like to know if there are a way to see density maps from .mtz files with chimera. I have tried opening a .mtz file after opening a .pdb file, but I got the next error message after choose CCP4 density map in the Type Selection window:
> Error reading file abc.mtz format ccp4
> File size 631624 too small for grid size
> (1297373728,929300992,1145110528) and 64 bytes of
> symmetry operators
> Does anyone could telling me if what I'm trying to do is possible and what is the way to do it?
> Thank you for your help,
> Luis L.

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