[gmx-users] Adding ions to membrane protein system

[anu chandra]

Dear Gromacs users,

I am working with membrane proteins. I have build my membrane-protein
systems  with a layer of water bed on top and bottom of the membrane. Now,
I would like to add a specific  concentration of KCl to bottom layer of the
water bed. Can anybody suggest me a way to add ions to a specific water
layer of the membrane-protein system?

Thanks in advance

Anu