Hi Chen,
    
    energy function:
    
    Grosse-Kunstleve RW, Afonine PV, Adams PD:
    cctbx news: Geometry restraints and other new features
    Newsletter of the IUCr Commission on Crystallographic Computing
    2004, 4, 19-36.
    
    Target values: 
    
    CCP4 Monomer Library and phenix.elbow or phenix.ready_set
    
    Pavel.
    
    On 12/2/10 3:43 PM, chene@umbi.umd.edu wrote:
    Dear authors of PHENIX,
          I just want to know what force field is used by phenix.refine,
          especially for simulated annealing, CHARMM, AMBER, or what
          else?
          Thanks.
          
          Chen
      
      Chen Chen, PhD, Research Associate
      Center for Advanced Research in Biotechnology (CARB),
      University of Maryland Biotechnology Institute (UMBI),
      9600 Gudelsky Drive, Rockville, MD 20850
      240-314-6122