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<DIV><FONT face=Arial size=2>Dear Gromacs Users.<BR>I’m new gromacs user and I
would be glad to get some advice from you.<BR>I wan to do MD of TM-protein in
DPPC lipid bilayer and then I would <BR>like to investigate interactions between
this protein and the ions present in the system. <BR>I’ve read the manual
and checked mailing list but some things are still not clear to me.<BR>Which
forcefield should I use for the protein and membrane simulation. <BR>I found
parameters for DPPC lipids but only for ffgmx forcefield (lipid.itp).
<BR> Is it correct to use those parameters with newer forcefield like
GROMOS96 43a1. <BR> Should I manually add new atom types for the DPPC
molecules? </FONT><FONT face=Arial size=2><BR>Thank you for your
help.<BR>All the best.<BR></DIV></FONT></BODY></HTML>