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DPH lifetime distributions in vesicles containing phospholipid hydroperoxides.

  • Author(s): Wratten, ML
  • Gratton, E
  • van de Ven, M
  • Sevanian, A
  • et al.
Abstract

Multifrequency phase fluorometry was used to determine the lifetime distributions of 1,6 diphenyl-1,3,5-hexatriene in 1-palmitoyl-2 linoleoyl phosphatidylcholine small unilamellar vesicles containing 2% incorporation of phospholipid hydroperoxides. A biexponential decay was observed in both vesicle preparations over a temperature range of 5 to 35 degrees C. Vesicles containing phospholipid hydroperoxides showed an overall longer lifetime as well as a greater distribution in width. These findings suggest that phospholipid hydroperoxides create structural heterogeneity in membrane structure.

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