Re: AMBER: nmanal projection

From: David A. Case <>
Date: Tue, 14 Oct 2003 15:11:29 -0700

On Fri, Oct 10, 2003, Qiang Lu wrote:
> Why in the nmanal projection of the normal mode vector onto internal
> coordinates(proj.f and bmat.f), there are two internal coordinate vectors
> correspond to one bond and three internal coordinate vectors correspond to
> an angle and four internal coordinate vectors correspond to one dihedral
> angle?

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I think you are seeing not internal coordinate vectors, but atom postions.
A bond is defined by two atoms, an angle by three, and a torsion by 4.

...hope this helps..dac

David A. Case                     |  e-mail:
Dept. of Molecular Biology, TPC15 |  fax:          +1-858-784-8896
The Scripps Research Institute    |  phone:        +1-858-784-9768
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Received on Tue Oct 14 2003 - 23:53:01 PDT
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