[gmx-users] Adding ions to membrane protein system

2015-07-02 Thread 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

Re: [gmx-users] Adding ions to membrane protein system

2015-07-02 Thread Mark Abraham
Hi, Dunno, never tried the walls code. Mark On Thu, Jul 2, 2015 at 11:37 PM João Martins joaomartins...@gmail.com wrote: As a completely pointless point since Mark just explained why it doesn't make much sense to do it, you can achieve the same by separating your waters in the [ molecules ]

Re: [gmx-users] Adding ions to membrane protein system

2015-07-02 Thread Mark Abraham
Hi, Your membrane is probably in the x-y plane, so you just insert ions everywhere and delete from the .gro file all that have a z coordinate bigger than whatever value aligns with the bottom of your membrane, and correct the number of atoms in the .gro and .top file accordingly. This won't help