AMBER: parm*.dat

From: Ivelin Georgiev <>
Date: Thu, 28 Sep 2006 12:39:23 -0400

For the vdW energy computation, R* = R_i + R_j, is computed as the sum
of the vdW radii (read from the parm*.dat file) of the two atoms i and
j. Is this in contradiction to the claim that the combining rule used is
the arithmetic mean (see Table 13 in [1])?

[1] Wendy D. Cornell, Piotr Cieplak, Christopher I. Bayly, Ian R. Gould,
Kenneth M. Merz, Jr., David M. Ferguson, David C. Spellmeyer, Thomas
Fox, James W. Caldwell, and Peter A. Kollman. "A Second Generation Force
Field for the Simulation of Proteins, Nucleic Acids, and Organic
Molecules." J. Am. Chem. Soc. 1995, 117, 5179-5197.
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Received on Sun Oct 01 2006 - 06:07:12 PDT
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