On 8/7/12 9:17 AM, vidhya sankar wrote:
Dear Justin ,
                    Thank you for your Previous useful  reply
I Have used the Lincs Alogrithim for NPT Equlibration MD. But For Main MD I 
would like to use Shake Algorithim With Shake _tol = 0.00001  with  
continuation = yes

Is it Correct to use two algorithm  for simulation of same system (NPT,  longMD)

To which extent  Will it Affect the result (Free energy)?  Because  I am doing 
Free energy calculation Based on Essential Dynamics ? Is it  possible

I'm not prepared to predict such things. Whatever conditions you choose, equilibrate sufficiently before collecting data. Switching algorithms and immediately collecting data rarely, if ever, makes sense.

-Justin

--
========================================

Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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