Hi all:<br>I am trying to simulate a polysaccharide in solution of water and CsCl, but cesium is not parametrized in the gromacs 4. I am using the force field GROMOS 96. <br>I have looked for the parameters of Cs+ in the OPLS Force field and I have created 4 files: Cs.atp, Cs.itp, Csnb.itp and Cs.rtp. Also I have include the parameters for Cs+ in the "ions.itp" file, but it didn't work, Can someone help me?<br>
Thanks in advance.<br>Cecilia.<br>