[gmx-users] ions.itp => no BR- ion defined (FF_Gromos 96)

[Mark Abraham]

Chih-Ying Lin wrote:
> HI
> BR- ion is defined in FF_OPLS.
> Could I mix two force fields, FF_Gromos 96 and FF_OPLS, in my system?
> 
> 
> ; full atom descriptions are available in ffoplsaa.atp
> ; name  bond_type    mass    charge   ptype          sigma      epsilon
> opls_402   Br- 35   79.90400    -1.000       A    4.62376e-01  3.76560e-01
> 
> 
> Does it make sense?

No. See http://wiki.gromacs.org/index.php/Force_Fields

Mark