[Chimera-users] Edge lengths of virus particles

Elaine Meng meng at cgl.ucsf.edu
Mon Dec 7 16:41:58 PST 2015

Hello Vamsee,
It sounds like you may be working with a map isosurface.  In that case you can measure the distance between two points on the isosurface by first placing markers at those two points.  See this previous post for details:


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 7, 2015, at 4:06 PM, vamsee <vamseedharr at gmail.com> wrote:
> Hello Elaine,
> I am trying to find the edge lengths of virus particles using Chimera. The method I came up with is to 
> 1. Create an icosahedron with the diameter of the virus. 
> 2. Create two atoms that sit on adjacent vertices of the icosahedron
> 3. Measure the distance between the two atoms
> But this method gives me the edge length of the icosahedron and not the virus itself. Is it possible to get the edge lengths of the actual virus without having to go through this process? 
> Thank you
> Vamsee

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