Hi,

packmol generates just coordinates (pdb format) for optimized packing arrangements of whatever molecule you provide as input. It's up to you to parameterize the resulting model. CHARMM-GUI has a library of conventional (phospho)lipids and generates the input for CHARMM equilibration of the bilayer model built with those lipids. But, you should inspect by yourself the corresponding sites.

Felipe

On 10/04/2012 03:11 PM, James Starlight wrote:
Dear Felipe,

thanks for advise. Does the Packmol software suitable for generation
coordinates of the bergers ( for gromos 56 ff) lipids ? As I know
CHARMM-GUI membrane builder is suitable for only CHARMM force field
lipids.

James


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