[Bioperl-l] torsion angle

[Reece Hart]

On Fri, 2008-05-23 at 12:35 +0300, Giwrgos Tataetis wrote:
> I am an undergraduate student in Biology and I ve been assigned to
> calculate the torsion angles in a molecule...
> Please can anyone help me finding some answers or even point some
> directions

Giwrgos-

I don't know why couldn't find this with google -- searching for
"protein torsion angles cross product" (unquoted) turns up two good
documents:

http://www.math.fsu.edu/~quine/IntroMathBio_05/torsion_pdb/torsion_pdb.pdf
http://en.wikipedia.org/wiki/Dihedral_angle

The first does a good job of explaining the vector math at a fairly
elementary level.

-Reece

-- 
Reece Hart, http://harts.net/reece/, GPG:0x25EC91A0