Bounding fluid viscosity and translational diffusion in a fluid lipid bilayer |
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Authors: | W L C Vaz J Stümpel D Hallmann A Gambacorta M De Rosa |
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Institution: | (1) Max-Planck-Institut für biophysikalische Chemie, D-3400 Göttingen, Federal Republic of Germany;(2) CNR, Istituto per la Chimica di Molecole di Interesse Biologico, Via toiano, 6, I-80072 Arco Felice (Napoli), Italy |
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Abstract: | Fluorescence recovery after photobleaching was used to investigate the translational diffusion of a fluorescent derivative of a membrane-spanning lipid in L
phase multibilayers of 1-palmitoyl-2-oleoylphosphatidylcholine prepared in water and in glycerol. The translational diffusion coefficient in hydrated bilayers (D
w) ranged between 2 and 5x10–8 cm2/s and in glycerinated bilayers (D
g) the range was between 3 and 24×10–10 cm2/s between 10° and 40°C. These results are discussed in terms of models for diffusion in membranes. |
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Keywords: | Translational diffusion lipid bilayers bipolar lipids fluorescence recovery after photobleaching models for diffusion |
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