Check out the Atom selection section for examples in the documentation.
http://www.phenix-online.org/documentation/refinement.htm#anch82

Good luck,

Engin

On 6/27/09 12:10 PM, Maia Cherney wrote:
Hi Engin,
thank you for your reply. That is exactly what I wanted. I just forgot 
the correct syntax. Actually, I could not find these words in the 
documentaion. I guess, they are very well hidden.

Maia

Engin Ozkan wrote:
  
Am I missing something?  How about this

refinement.ncs.restraint_group {
   reference = chain A and not (resid 125 or resid 248 or ...)
   selection = chain B and not (resid 125 or resid 248 or ...)
}

as it is in http://www.phenix-online.org/documentation/
I don't think this is harder than excluding residues with an "option".

Engin

On 6/27/09 10:28 AM, Pavel Afonine wrote:
  
    
Hi Maia,

   
    
      
I made all restraint_groups in my parameter file. It's just too many of
them. I thought that may be there is an option to say exclude residues
125, 248 etc.
     
      
        
No - there is no such command: you need to edit selections manually.

   
    
      
By the way, I have  excessive_distance_limit = None. If I
change it to some number, how does it work? the violating residues will
be  excluded or the whole molecule will?

     
      
        
I'm not sure, Ralf knows this better. Ralf, could you comment on this
please?

My guess, that all this parameter does is it checks the distances
between atoms in NCS copies and if there is a distance larger than
excessive_distance_limit, then phenix.refine stops and tells you this.

Pavel.

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-- 
Engin Özkan 
Post-doctoral Scholar 
Laboratory of K. Christopher Garcia 
Howard Hughes Medical Institute 
Dept of Molecular and Cellular Physiology 
279 Campus Drive, Beckman Center B173 
Stanford School of Medicine 
Stanford, CA 94305 
ph: (650)-498-7111