what restraint can I use to prevent membrane diffusion on the Z-axis?

From: Jose Borreguero (borreguero_at_gmail.com)
Date: Wed Feb 22 2012 - 14:07:30 CST

Dear NAMD users,

While simulating a DLPC membrane, I noticed that it tends to diffuse along
the normal (Z-axis) component. Is there a 'standard' restrain that is used
to prevent such diffusion?
The first option I thought was to restrain the center of mass of the whole
membrane along the Z-axis, but I don't know what is a reasonable value for
the force constant.
If anyone has any experience dealing with this kind of problem, please do
reply.

Best regards,
Jose M. Borreguero

This archive was generated by hypermail 2.1.6 : Mon Dec 31 2012 - 23:21:14 CST