Zhang Bing, I guess it is problem in your visualizers. Try to label the atom using VMD which goes well with most of the file types derived in GROMACS. I hope you'll see the atom as FE not just F.
Thanks Peterson -- View this message in context: http://gromacs.5086.n6.nabble.com/Fwd-HEME-cysteine-gromacs-simulation-tp4957846p4962257.html Sent from the GROMACS Users Forum mailing list archive at Nabble.com. -- gmx-users mailing list [email protected] http://lists.gromacs.org/mailman/listinfo/gmx-users Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/Search before posting! Please don't post (un)subscribe requests to the list. Use the www interface or send it to [email protected]. Can't post? Read http://www.gromacs.org/Support/Mailing_Lists

