torsion potentials for phi/psi angles in CHARMM force field?

From: Roman Petrenko (rpetrenko_at_gmail.com)
Date: Sat Aug 09 2008 - 14:52:55 CDT

Dear community,
please correct me if i am wrong.

The torsion potentials defined in charmm27 force-field are:

V_psi = 0.6 (1+cos(psi))
V_phi = 0.2 (1-cos(phi))
V_omg = 1.6 (1+cos(omg)) + 2.5 (1-cos(2*omg))

that's all i've found, but aren't there supposed to be three potential
wells for phi and psi instead of one?

-- 
Roman Petrenko.
Physics Department
University of Cincinnati

This archive was generated by hypermail 2.1.6 : Wed Feb 29 2012 - 15:49:44 CST