SMD and langevin dynamics

From: snoze pa (
Date: Sat Feb 06 2010 - 19:00:15 CST

Dear NAMD users,

I have a question related to SMD simulation related to langevin
dynamics. In SMD simulation (stretching) of deca-alanine in vacuum
constant temperature tutorial, the value of langevin is ON

while in ubiqutin tuorial
langevin is set to OFF.

Which one is right preference for langevin in SMD simulation.

Thank you very much for your time and help.

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