<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi all,<br><br>I'm using ffamber99p ff in gromacs and now I have to use
some additional parameters in the force field. Regarding to designation
of proper dihedrals in AMBER, in some cases there are 2 or 3 dihedrals
given for a specific torsion, in which parameters(e.g. angles) differ
from each other and there also has been defined periodicities of -1,-2
etc.<br>the question is how to implement such dihedrals in GROMACS,<br>thanks
very much for any instruction.<br><br>bests,<br>Amin</td></tr></table><br>