hello Justin:
  thank you very much for kind reply.
  In gromacs  tutorial I found that the author use the following paramters:

tc-grps = Protein DPPC SOL_CL ; three coupling groups - more accurate
comm-grps    = Protein_DPPC SOL_CL


do you have any idea why did he use different groups for above paramters in NVT.mdp?

thank you very much


On 04/25/2012 04:13 PM, Justin A. Lemkul wrote:


On 4/25/12 10:07 AM, Albert wrote:
Hello:

I am running a membrane simulation with gromacs and I wondering how to deal with energygrps? Should I put protein and lipids into one energygrps? Or I should
leave the lipids stay with solvent and ions?


You can divide the system in any way you like for energygrps; it's just a decomposition of the nonbonded terms. The way your break it down depends on what you care to measure in the system.

-Justin


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