Hi Dallas, thanks for your answer. I saw README file in gromos54a7_atb.ff from ATB server.
My system contains lipid molecules and small molecule. For lipid molecules, Justine Lemkul suggested to use gromos53a6_lipid.ff. How to use both of gromos54a7_atb.ff and gromos53a6_lipid.ff in topology file. Please guide me. Best, Atila -- 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.
