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Biophysical Journal 65: 1429-1432 (1993)
© 1993 the Biophysical Society

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Support for the shape concept of lipid structure based on a headgroup volume approach.

Y C Lee, T F Taraschi and N Janes

Department of Pathology and Cell Biology, Medical College of Thomas Jefferson University, Philadelphia, Pennsylvania 19107.

ABSTRACT

Headgroup volumes of seven dioleoyl lipid species, calculated from covalent radii, are shown to correlate linearly (r = 0.95) with the ability of those lipids to alter the midpoint temperature of the lamellar to inverted hexagonal phase transition (L alpha-->HII) of a 95 mole fraction percent phosphatidylethanolamine matrix. The results illustrate the utility of the shape concept and basic considerations of headgroup volume as a predictive tool for the determination of lipid structure.




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Copyright © 1993 by the Biophysical Society.