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<DIV>Dear GMX users,</DIV>
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<DIV>I have a question about running MD simulation using amber force field. It is easy to prepare the top and gro files of protein with amber force field, but how should I prepare the itp and gro files of small molecules with GAFF force field? I know the program ANTECHAMBER and tleap can generate the some molecule's topology and coordinate. Could someone give me some hints? Thanks very much in advance!</DIV>
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<P align="left"><U>Best wishes,</U></P>
<P align="left"><U>Qinghua Liao</U></P>
<P align="left"><U>Ph.D student of Tianjin University, China</U></P></DIV>