Dear GMX users; I hope you are well. I want to simulate the interactions between DNA and Ag clusters. The problem is that Amber99 ff does not know silver atoms and residues. I have defined Ag and Au in atomtypes.atp and assigned Ag LJ parameters in ffnonbonded.itp. But I cannot find out how to define new residues. I would be so thankful if you help me solve this problem. ========================================================== Kavosh Zandsalimi Biophysics MSc student Institute of Biochemistry and Biophysics(IBB), University of Tehran, Enghelab Ave., Tehran, Iran P.O. Box: 13145 - 1384
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