Headgroup hydration in egg-lecithin multibilayers affects the behaviour of DPH probes
✍ Scribed by H. Van Langen; D. Engelen; G. Van Ginkel; Y.K. Levine
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 442 KB
- Volume
- 138
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Angle-resolved fluorescence depolarization experiments were carried out on DPH molecules embedded in egg-licithin bilayers of different water contents. It was found that the order parameter ( Pz) of the absorption moment is significantly higher than that of the emission moment and that the difference increases on hydrating the lecithin headgroups. The changes in the order parameter ( Pz) and (P.,) of the DPH molecules induced by hydration are consistent with X-ray diffraction data. Furthermore the reorientational motions of the DPH molecules were found to become faster with increasing hydration.