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Electrostatic interactions in polyglutamic acid

Electrostatic interactions in polyglutamic acid Conformational energy estimates were made for completely charged polyglutamic acid with different assumptions concerning the placement of side chain charge. Viewed as a helix, the minimum energy structure is somewhat affected by the side‐chain charge placement. The average energy of the chain viewed as a random coil is equal to or less than the average energy of the chain viewed as a helix. Unlike the polyacrylate chain, nearest‐neighbor charge interaction is shown to increase the chain dimensions. Although the calculations are approximate there is little evidence to suggest that isolated polyglutamate molecules in the absence of added electrolyte should behave as rods or that there are significant amounts of locally ordered structures. Presently no experimental results exist under conditions appropriate to isolated molecular calculations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Biopolymers Wiley

Electrostatic interactions in polyglutamic acid

Biopolymers , Volume 12 (4) – Apr 1, 1973

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References (33)

Publisher
Wiley
Copyright
Copyright © 1973 John Wiley & Sons, Inc.
ISSN
0006-3525
eISSN
1097-0282
DOI
10.1002/bip.1973.360120413
pmid
4695679
Publisher site
See Article on Publisher Site

Abstract

Conformational energy estimates were made for completely charged polyglutamic acid with different assumptions concerning the placement of side chain charge. Viewed as a helix, the minimum energy structure is somewhat affected by the side‐chain charge placement. The average energy of the chain viewed as a random coil is equal to or less than the average energy of the chain viewed as a helix. Unlike the polyacrylate chain, nearest‐neighbor charge interaction is shown to increase the chain dimensions. Although the calculations are approximate there is little evidence to suggest that isolated polyglutamate molecules in the absence of added electrolyte should behave as rods or that there are significant amounts of locally ordered structures. Presently no experimental results exist under conditions appropriate to isolated molecular calculations.

Journal

BiopolymersWiley

Published: Apr 1, 1973

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