All of the Charmm force field parameters may be found on Alex MacKerell's website: http://mackerell.umaryland.edu/ CHARMM_ff_params.html. Converting from Charmm units and potential form to Gromacs is straightforward.

Andrew

On Dec 7, 2011, at 12:59 PM, Michael McGovern wrote:

Hi everyone. I'm doing a simulation in gromacs using the charmm36 parameters from the gromacs website. The parameters don't seem to have carbohydrates, which are part of the charmm36 force field. In particular, I need parameters for trehalose. Is there anywhere I can find these parameters in a format suitable for gromacs?
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