EPR spectra of spin labels in lipid bilayers : II. Rotation of steroid spin probes

Schindler, Hansgeorg and Seelig, Joachim. (1974) EPR spectra of spin labels in lipid bilayers : II. Rotation of steroid spin probes. Journal of Chemical Physics, 61. pp. 2946-2949.

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Official URL: http://edoc.unibas.ch/dok/A5257563

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The spin label method is used to investigate the nature of molecular motion in a liquid crystalline bilayer. The EPR spectra of different spin labels are simulated by means of perturbation theory. Using the diffusion model with a restoring potential the rotational diffusion coefficients for the different spin labels are evaluated from the linewidth. Rotational diffusion and viscosity are related by a modified Stokes‐Einstein‐Perrin formula. The correction factors account for the difference between the effective viscosity during rotation and the (translational) viscosity and are interpreted in terms of the geometry and the ordering of the spin probes. The bilayer viscosity η is found to be 3.7 cp ≤ η ≤ 5.7 cp.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Former Organization Units Biozentrum > Biophysical Chemistry (Seelig J)
UniBasel Contributors:Seelig, Joachim
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:AIP Publishing
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:24 Apr 2017 09:24
Deposited On:22 Mar 2012 13:18

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