[gmx-users] RB Dihedrals with ffamber96 in Gromacs 4.5.3?

[Mark Abraham]

On 12/01/2011 2:50 AM, RJ Nowling wrote:
> Hi all,
>
> This is my first time posting to the list, so please excuse any
> ignorance on my part.  I'm preparing a few test systems using Gromacs
> 4.5.3 with the ffamber96 forcefield.  When I use gmxdump on the
> resulting tprs, I see Proper Dihedrals but not RB Dihedrals.  Does
> ffamber96 use RB Dihedrals and is it an expected result to not contain
> RB Dihedrals?  For reference, I'm preparing DHFR and a ww mutant.

Check out the contents of the [dihedraltypes] section of 
$GMXLIB/share/top/amber96.ff/ffbonded.itp in context of manual Table 
5.5. When preparing topologies for new systems, knowledge of chapter 5 
of the manual will never go astray.

Mark