[gmx-users] CU2+ nonbonded parameteres (sigma and epsilon)

[Mohsen Asadbegi]

Hi!

I need to add non-bonded CU2+ ion to CHRAMM36. How can I find these
parameters (sigma and epsilon)? Does it enough to define CU2+ by its
charge, mass, sigma and epsilon?
In addition, I want to know that what are the units of sigma and epsilon in
the CHARMM36 force field?

Regards,
Mohsen Asadbegi.