AMBER: ff99 vs ff99SB for RNA

From: Brent Krueger <>
Date: Thu, 14 Jun 2007 10:05:12 -0400


I believe this is a pretty simple question about recent force
fields. In looking through the ff99SB frcmod file, it looks to me
like these dihedrals should not have any effect on DNA or RNA. But,
I recall Carlos mentioning something about a small difference in DNA
behavior between ff99 and ff99SB on this list recently.

Am I remembering Carlos's statement incorrectly, or am I looking at
the frcmod file incorrectly?


Brent P. Krueger phone: 616 395 7629
Associate Professor fax: 616 395 7118
Hope College SC 2120
Department of Chemistry
Holland, MI 49423

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Received on Sun Jun 17 2007 - 06:07:22 PDT
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