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The interaction of phenol with lipid bilayers

✍ Scribed by H. Van Dael; P. Ceuterickx

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
457 KB
Volume
35
Category
Article
ISSN
0009-3084

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✦ Synopsis

The depression of the phase-transition temperature of dimyristoyl-and dipalmitoylphosphatidyicholine vesicles induced by phenol has been investigated by fluorescence polarization. This effect is strongly pH and concentration dependent. Only the uncharged phenol molecule influences the fluidity of the bilayer so that the interaction of phenol with the bilayer can be situated in the hydrophobic acyl chain region. Direct measurements of the partitioning of phenol in the phospholipid vesicles confirm these results and show a limited and concentrationdependent solubility. Phase-transition temperature depressions, obtained from thermodynamic analysis of partition coefficient measurements, are in good agreement with the experimental values.

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