[gmx-users] Counter ion and PME

[Carlo Camilloni]

Dear Gromacs users,
I have read in CSC Course Material that it is possible
to do not add counter ions in a charged system with
PME electrostatics , because gromacs (3.3.1 ?) adds a
background uniform charge to neutralize the system.
Is this neutralization correct and used in literature?
Thanks for your help,
Carlo Camilloni