[Chimera-users] Sphere radius

Elaine Meng meng at cgl.ucsf.edu
Thu Jan 7 08:50:28 PST 2010

Yes -- the spheres show atomic VDW radii, and there are several ways  
to change VDW radii.  One way is the command vdwdefine, for example:

vdwdef +0.5 C
(add 0.5 angstroms to VDW radii of carbons)
(go back to default VDW radii)

Information on VDW radii in Chimera and several ways to change them:

Note that changing the VDW radii will affect other calculations such  
as "findclash" and molecular surface generation.  It may be better to  
use the default radii for those purposes.

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 Jan 7, 2010, at 7:10 AM, Yasser Almeida Hernández wrote:

> Hi...
> Can i change the radius of the sphere atoms representation ...?
> Thanks

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