[Chimera-users] density maps in chimera- question

Tom Goddard goddard at cgl.ucsf.edu
Fri Aug 22 11:06:28 PDT 2008

Hi Sarah,

  Chimera does not show sigma values for a crystal map in the volume 
dialog.  It shows whatever values are actually in the map file.  Here is 
a description of how to convert to sigma values:


Chimera map display was primarily intended for electron microscopy, 
hence the deficiencies with crystal maps you are encountering.  Allowing 
direct display of sigma values is item 153 on our requested features list:



Sarah Boyce wrote:
> Thanks Tom. I also was wondering about the display options for the 
> density. How does the histogram display level correlate to the sigma 
> level of the map?
> Sarah

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