[gmx-users] Different coefficients for 1-4 pairs of nonbonded interactions.

[Artem Shekhovtsov]

Hello!
I was faced with the need to use different coefficients for 1-4 nonbonded
interactions.
Some pairs in the molecule use a coefficient 0.5 for LJ and Coulomb
interactions, others use a coefficient 0.833.
I can use the [pairtypes] section to change the LJ coefficients, but this
will not allow me to do the same for Coulomb interactions.

How can I implement this behavior in gromacs and is it possible at all?

Thank you,
Artem Shekhovtsov.