<DIV><FONT face=Arial size=2>Dear all,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I am trying to make MD simulation of fullerene derivatives with HIV protease..When I try to convert merged pdb file of protein+ligand to gmx file, using forcefields like G43a1 it gave error message as residue 'lig' not found in residue topology database. </FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Is anybody knows which parameters in ff should I change?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Kind Regards,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Serdar</FONT></DIV><p> 
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