AMBER Archive (2008)

Subject: Re: AMBER: Atom types/parameters for chromene

From: David A. Case (
Date: Wed Mar 05 2008 - 13:15:25 CST

On Wed, Mar 05, 2008, Francesco Pietra wrote:

> Does this mean that ff99SB is les integrable with gaff than parm99 and parm94?

No. ff99SB only differs from ff99 in the phi and psi torsion angle parameters
for proteins. ff99 and ff99SB would be expected to be equally good in
combination with gaff.


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