[Chimera-users] [chimera-dev] change hand ?

Tom Goddard goddard at cgl.ucsf.edu
Fri Feb 15 13:59:52 PST 2008

Hi Stefan,

  You can flip the hand of the map by making the grid spacing negative 
along one axis.  Chimera wasn't intended to do this so I'm not sure 
everything will work correctly.  To make this change use the volume 
dialog Coordinates panel and change voxel size from (for example) 0.37 
to 0.37 0.37 -0.37.  The three numbers are grid plane spacing along the 
x, y, z axes.  If they are all the same Chimera just shows one number.

  In Chimera 1.2470 the volume surface will become dark.  To remedy this 
use the volume dialog Surface and Mesh options panel and turn off 
"two-sided surface lighting".  A current Chimera daily build will not 
have that problem.

  Chimera won't correctly save the flipped map.  So this is not an ideal 
way to proceed.  I don't know of software that will write out the 
flipped map though it must exist.


Stefan Backstrom wrote:
> Hi.
> Is it possible to flip the hand of a cryo-EM map in chimera ?
> Best wishes,
> Stefan Bäckström
> Medical Biochemistry and Biophysics
> Umeå University
> Sweden
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> Chimera-dev at cgl.ucsf.edu
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