Depends on what you are simulating. Na+ concentration inside cell is very low, comparing to K+. Thus, if you are simulating cell biomolecules, you should go for K+, and for other cases, Na+.
Still, there are some issues with KCl crystal formation on some forcefields when simulating polyelectronic biomolecules (nucleic acids and membranes), widely reported. I would check this cases before designing any simulation Cheers, -- Marcelo Depólo Polêto Structural Bioinformatics Group Master Student - BCM/UFRGS B.Sc. Biochemistry - UFV Em 13/09/2015 09:42, "Vitaly V. Chaban" <vvcha...@gmail.com> escreveu: > Perhaps, K+ is even better. > > > > > On Sun, Sep 13, 2015 at 4:10 AM, Andrew Bostick <andrew.bosti...@gmail.com > > > wrote: > > > Dear gromacs users, > > > > For neutralizing the simulation system, can I use K+ ions instead of NA+? > > > > Best, > > Andrew > > -- > > Gromacs Users mailing list > > > > * Please search the archive at > > http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before > > posting! > > > > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > > > > * For (un)subscribe requests visit > > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or > > send a mail to gmx-users-requ...@gromacs.org. > > > -- > Gromacs Users mailing list > > * Please search the archive at > http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before > posting! > > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > > * For (un)subscribe requests visit > https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or > send a mail to gmx-users-requ...@gromacs.org. > -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.
