<HTML><FONT FACE=arial,helvetica><FONT COLOR="#000000" FACE="Times" FAMILY="SERIF" SIZE="3">Dear GMX Users,<BR>
<BR>
I am attempting to convert Amber OPLS dihedral parameters to GMX RB parameters, but I’m having some trouble. I have searched through the archives and found replies about the same problem. The replies state that the conversion is described in the GMX Users manual. I have read the force field section covering dihedral conversion to RB, but I still am not sure how to proceed. Amber OPLS has multiple definitions for dihedrals using different PN, but GMX only has one line containing the six RB parameters C 0-5. If someone in the list has experience with these conversions, please enlighten me.<BR>
<BR>
Thank you,<BR>
<BR>
David Justice<BR>
Researcher<BR>
Gogonea Computational Chem. Group </FONT><FONT COLOR="#000000" FACE="Times" FAMILY="SERIF" SIZE="2"> <BR>
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