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There is also a small set of auxiliary (data) files.
http://www.biosci.ki.se/md/charmm.html These scripts are also available on this link.
http://www.charmm.org/ubbthreads-7-5-5/ubbthreads.php?ubb=showflat&Number=186#Post186 If you have questions about how to use these scripts or any issues associated with them, please follow this thread on the CHARMM forum.
VMD TCL script to calculate density profile normal to z-axis
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