Hi, i use g_rms to calculate rms,
as reference structure (-s) i use myprotein.pdb file and trajectory (-f) is a trajectiry after MD MDprotein.pdb. The thing is that myprotein.pdb and MDprotein.pdb have the same atoms BUT their order within a residue is DIFFERENT. example: myprotein.pdb: ATOM 1 N ALA E 1 18.858 -22.883 26.306 1.00 0.00 ATOM 2 CA ALA E 1 19.106 -24.277 26.027 1.00 0.00 ATOM 3 C ALA E 1 20.206 -24.458 25.006 1.00 0.00 ATOM 4 O ALA E 1 20.156 -23.801 23.972 1.00 0.00 ATOM 5 CB ALA E 1 17.865 -24.819 25.301 1.00 0.00 MDprotein.pdb: ATOM 1 N ALA 1 18.861 24.179 26.290 1.00 0.00 ATOM 2 CA ALA 1 18.978 22.741 26.011 1.00 0.00 ATOM 3 CB ALA 1 17.670 22.190 25.440 1.00 0.00 ATOM 4 C ALA 1 20.069 22.592 24.949 1.00 0.00 ATOM 5 O ALA 1 20.120 23.450 24.070 1.00 0.00 whether g_rms work correct in this case? g_rms -s myprotein.pdb -f MDprotein.pdb _______________________________________________ gmx-users mailing list gmx-users@gromacs.org http://www.gromacs.org/mailman/listinfo/gmx-users Please search the archive at http://www.gromacs.org/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/mailing_lists/users.php