Light Scattering Investigation of Electric Field Alignment of Phospholipid Tubules

The polymerizable diacetylenic phospholipid 1,2-bis(10,12,tricosadiynoyl)- sn-glycero-3-phosphocholine (DC 23PC) forms straight hollow cylinders in water. Using an ac electric field it was possible to achieve significant orientational alignment of the tubules parallel to the field direction, and fro...

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Bibliographic Details
Published inBiophysical journal Vol. 54; no. 2; pp. 289 - 294
Main Authors Li, Zili, Rosenblatt, Charles, Yager, Paul, Schoen, Paul E.
Format Journal Article
LanguageEnglish
Published Bethesda, MD Elsevier Inc 01.08.1988
Biophysical Society
Subjects
Biological and medical sciences
Disperse state. Micelles
electric fields
Fundamental and applied biological sciences. Psychology
Molecular biophysics
Physico-chemical properties of biomolecules
Phospholipid
Polymerization
Electric field
Microtubule
Acetylenic compound
Bilayer
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Summary:The polymerizable diacetylenic phospholipid 1,2-bis(10,12,tricosadiynoyl)- sn-glycero-3-phosphocholine (DC 23PC) forms straight hollow cylinders in water. Using an ac electric field it was possible to achieve significant orientational alignment of the tubules parallel to the field direction, and from light scattering results deduce an effective dielectric susceptibility anisotropy Δχ E. Moreover, we suggest that the alignment arises from an orientational anisotropy of the total electrostatic enthalpy for a dielectric tubule in an electric field, rather than an inherent polarizability anisotropy of the constituent DC 23PC molecules, as was the case with magnetic field alignment.
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ISSN:0006-3495
1542-0086
DOI:10.1016/S0006-3495(88)82958-8