Hello,
I am a new user of Gromacs, and I am trying to simulate a system of a membrane 
composed by POPC, cholesterol and sphingomyelin and a protein. I am using 
lipid.itp, but it includes ffgmx.itp, and I have read it is deprecated, so I am 
having a lot of problems to introduce the protein topology with ffG43a1 or 
opls, without using ffgmx.itp also for the protein. 
I would like to know which is the recommendation, because I am a bit confused 
about this, an in the case of using a different force field from the deprecated 
ffgmx for the protein, does anybody know where I could get the paremeters for 
the Berger lipids constructed with a more modern forcefield than ffgmx?
I hope somebody could help me, I will really appreciate your advices.
Best wishes, 
 
Rebeca Garcia
Parc Cientific de Barcelona 
Universidad de Barcelona
[EMAIL PROTECTED]

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