By default, PyMOL creates single bonds when joining fragments.  To
change a bond valence, CTRL-right click on the bond to select it.  You
should see a "ring" about the bond.  Then press CTRL-W to cycle through
the possible bond valences: single, double, triple.

Note that it is essentially impossible right now to build complex
molecules in PyMOL without using some external molecular minimization
and mechanics program, since the "molecular sculpting" feature can only
maintain pre-existing atomic geometries.  

For coarse modeling of protein-ligand interactions, I tend to use PyMOL
to draw the initial covalent structures, use MacroModel to perform
energy minimization, and then return the structure to PyMOL for purposes
modeling the complex.

- Warren

--
mailto:[email protected]
Warren L. DeLano, Ph.D.
Informatics Manager
Sunesis Pharmaceuticals, Inc.
341 Oyster Point Blvd.
S. San Francisco, CA 94080
(650)-266-3606  FAX:(650)-266-3501



> -----Original Message-----
> From: Guillaume Michaud [mailto:[email protected]]
> Sent: Monday, March 11, 2002 12:43 PM
> To: [email protected]
> Subject: [PyMOL] Create a double bond
> 
> 
> PLEASE WRITE BACK TO 
> [email protected]
> 
> Hi,
> 
> I was just wondering how to create a 
> double bond between two atoms (for 
> example between a carbon and an oxygen 
> or C=C).
> 
> Thankx
> r1ck5p
> -- 
> 
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