[gmx-users] what is the atom type CHE

[Makoto Yoneya]

Dear GROMACS users:

In the ffgmxnb, there are some atom type entries that are not in
the GROMACS manual.
I'm especially wondering the atom type CHE.
It looks like some bare carbon atom type from its mass.
Please tell me for what this CHE atom types should be used.
Sorry if it is FAQ or somewhere described

Thank you for advance.

Makoto Yoneya, Dr.
Liquid Crystal Nano-system Project,
Japan Sci. & Tech. Agency