Daer kannan Thanks for your reply
Picture relating to g_dist is in the following link: https://www.dropbox.com/s/c86ubhdguy9ai8b/g_dist.bmp Distance between protein and cnt was increased in during 1000-2500 ps, exactly those frame are unusaul in VMD (in my opinion, pbc problem). Best wishes -- 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.