...msms can calculate the surface of an atom list (generated from a pdb). This surface is triangulated and calculating the volume from a triangulated surface should be very easy. Regards Martin _______________________________________________ gmx-users mailing list gmx-users@gromacs.org http://www.gromacs.org/mailman/listinfo/gmx-users 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