> Hi, I'm trying to define a grammar for describing the secondary
structure
secondary structure is described in terms of spatial angles known
as dihedral angles, which specify the angles between the nitrogen and
carbon atoms of the backbone of the polypeptide.
you can check the following site. its very useful for understanding
various aspects of protein structure, right from the beginning:
www.pps97.cryst.bbk.ac.uk\course\index.htm
go to the "protein geometry" page, and then subsequently to the
secondary structure page.
also, if you can check this book out, i think you'd find it quite
useful:
Introduction to Protein Structure, by Branden,Carl and Tooze,John
hope this helps.
sandy
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