[gmx-users] Lennard Jones parameters for Sp, Sp2 and Sp3 nitrogen identical?

[Ebert Maximilian]

Dear list, 

I already asked the question in the AMBER list but couldn’t get an answer. So I try my luck here even though it is a bit off topic in the GROMACS list. I was wondering why the different atom types of H, C and O have different LJ-parameter but for all the different types of N we see the identical parameters in OPLS, AMBER and CHARMM?

Thank you very much,

Max