<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial, helvetica, sans-serif;font-size:10pt"><DIV>Hello,</DIV>
<DIV>I am running the pdb2gmx command for a homodimer protein with SF4 (a ferro-sulphur cluster) ligand but it fails to generate the .gro file. A error is coming SF4 not found in residue topology database. I have trired all the different force fields. Can anybody please tell me how to correct the error? How to modify the rtp file to consider the ligand? </DIV>
<DIV> </DIV>
<DIV>Subarna thakur</DIV>
<DIV>University of north bengal</DIV></div><br>
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