[chimera-dev] a request again...adjust torsion for pseudo bonds

[Elaine Meng]

On May 26, 2009, at 2:15 PM, Eric Pettersen wrote:
>
> 2) use the roll command to rotate around the metal/chelating-atom  
> axis (use an "axis" argument which is an atom spec selecting the  
> metal and chelating atom; a "center" argument which is one of the  
> two atoms; and a "models" argument which is the model(s) containing  
> the metal and chelating residue).  These arguments to the roll  
> command are only available in the daily build.
>

Just to (possibly) clarify #2: the "models" will be the ones to move  
in the roll while any others remain fixed.  If you want any part to  
move relative to another, they must be in different models.  Even  
though the "axis" would contain the metal and one coordinating atom,  
"models" wouldn't necessarily have to include the metal.  Also, I  
don't think it is necessary to give the "center" in this case, because  
by default it will lie on the axis.

<http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/roll.html>

Elaine