[Chimera-users] Question about bond length modification

Elaine Meng meng at cgl.ucsf.edu
Mon Jul 14 10:40:42 PDT 2008

Hi Ben,
If you Ctrl-doubleclick a bond, a menu should show up that includes  
the option to "Set Bond Length" - this opens a dialog in which you can  
change the length.  Another route to the same thing is to open the  
"Build Structure" tool (under Tools... Structure Editing), change to  
the "Set Bond Length" tab, Ctrl-click on a bond to select it, and edit  
the length in the dialog.

I just now tested this in 1.2470, the production release from last  
November, with structure 1zik fetched from the PDB.  I am guessing you  
really have this version (1.1470 would be astoundingly old, and I'm  
not sure we ever made a release with that version number).  Even  
though you can change bond length in 1.2470, I recommend getting the  
newer production release 1.2540 for its many new features and  

I hope this helps,
Elaine C. Meng, Ph.D.                          meng at cgl.ucsf.edu
UCSF Computer Graphics Lab and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco

On Jul 11, 2008, at 12:13 AM, Benjamin G.S. Horsman wrote:

> Hello,
> I have what appears to be simple problem but is I can't find the
> solution in previous mailing list queries.  My problem is that I am
> unable to modify the lengths of any bonds in a PDB  molecule.
> I am rather frustrated with myself over such a stupid problem, having
> tried dozens of times over dozens molecules to get it right but to no
> avail.  Any possible solutions from the community?
> I am using MacpyMol to generate PDB structures and Chimera v1 build  
> 1470.
> Thanks for any help,
> Ben

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