AMBER Archive (2007)

Subject: AMBER: (no subject)

From: Catein Catherine (askamber23_at_hotmail.com)
Date: Thu Jun 14 2007 - 00:54:28 CDT

Dear Sir/Madam,

I could like to ask if AMBER include the 0.5 when they specify spring
constants for their restraint terms?

If examples, if we assume the biasing potential used for PMF calculations is
of the format (required for WHAM calculations):

V = 0.5 k (x - xo)^2

And did the restrainst as it is listed below

# variable distance restrainst
&rst iat=4,5 r1=0.0, r2=20.0, r3=20.0, r4=100.0, rk2 = 100.0, rk3 = 100.,
iresid=1,
ATNAM(1)=P,
ATNAM(2)=O18/

Is the spring constants equal to 100?

Best regards,

Cat

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