AMBER: improper torsions

From: Ed Pate <>
Date: Mon, 8 Jan 2007 11:08:36 -0800 (PST)

Dear Amber community:

I am tring to simulate an ATP analog. I generated the .prep file using
antechamber. The analog has a ring structure hanging of the ribose, with
several sp2 atoms in the ring. When I look at my leap.log file, there are
several warning statements "No sp2 improper torsion term ..." for the sp2
atoms in the ring, plus one for the adenine ring itself. They were not
generated by antechamber. Does the warning indicate that amber has
recognized the problem and fixed it, or do I need to include them in
my .prep file?

Thanks for the help.

Ed Pate
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Received on Wed Jan 10 2007 - 06:07:28 PST
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