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Biophysical Journal 2: 317-326 (1962)
© 1962 the Biophysical Society

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Elastic Moduli of Helical Polypeptide Chain Structures

S. Enomoto and S. Krimm

ABSTRACT

The elastic moduli of the {alpha}-helix, polyglycine II, and the parallel-chain and antiparallel-chain pleated sheet structures have been calculated. A Urey-Bradley type of potential was used, extended by the inclusion of hydrogen bond stretching terms where appropriate. In the one instance where a valid comparison with experimental data can be made, viz, {alpha}-keratin, the calculations indicate that the matrix component, rather than being amorphous, probably contains an ordered structure of higher modulus than the {alpha}-helix.






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Copyright © 1962 by the Biophysical Society.