[gmx-users] adding counter ions

[Mark Abraham]

OZGE ENGIN wrote:
> Dear Mark,
> 
> I had read papers about the simulations of charged systems. You' re right. In these studies, the distance between the charged residues have been controlled during the simulation. 
> 
> In this respect, you suggest me not adding counter ions to the system:
> 
> Providing the distance between the oppositely charged residues :-) is not far apart than the optimum which means that they are located at such a distance that they have the ability to cancel each other. 

If they're already 3 angstrom apart you won't want counter ions, but if 
they're 3nm apart you will.

Mark