Medical College of Wisconsin
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Concentration of oxygen in lipid bilayers using a spin-label method. Biophys J 1983 Mar;41(3):283-6

Date

03/01/1983

Pubmed ID

6301572

Pubmed Central ID

PMC1329181

DOI

10.1016/S0006-3495(83)84439-7

Abstract

The concentration of oxygen in the hydrocarbon region of lipid bilayer has been determined using a novel electron spin resonance (ESR) nitroxide-radical spin-probe method. For dimyristoylphosphatidylcholine (DMPC), the partition coefficient above the main transition temperature is approximately 3. Rapid decrease to 0.2 occurs below the pretransition temperature indicating exclusion of oxygen in the crystalline phase. The differences of molar free energy, enthalpy, and entropy of mixing between water and lipid have been determined for each phase.

Author List

Subczynski WK, Hyde JS

Author

Witold K. Subczynski PhD Professor in the Biophysics department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Dimyristoylphosphatidylcholine
Electron Spin Resonance Spectroscopy
Lipid Bilayers
Mathematics
Oxygen
Phosphatidylcholines
Temperature
Thermodynamics