alexa Study of the orientational ordering of carotenoids in lipid bilayers by resonance-Raman spectroscopy.
Nutrition

Nutrition

Journal of Nutrition & Food Sciences

Author(s): van de Ven M, Kattenberg M, van Ginkel G, Levine YK

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Abstract The orientational ordering of beta-carotene and crocetin embedded in lamellar model membranes has been investigated by angle-resolved resonance Raman scattering at a temperature well above the phase transition of the lipid chains. It is shown that the ordering of the carotenoids is dependent on the chemical composition of the lipid bilayers. The orientational distribution functions found clearly show that beta-carotene is oriented parallel to the bilayer plane (dioleoyl lecithin) or perpendicular to it (soybean lecithin). For dimyristoyl lecithin at 40 degrees C, egg-lecithin, and digalactosyl diacylglycerol two maxima were found in the orientational distribution: one parallel and one perpendicular to the bilayer surface. Crocetin embedded in soybean lecithin bilayers yields a similar bimodal distribution function. Because of rapid photodegradation no results could be obtained for spirilloxanthin.
This article was published in Biophys J and referenced in Journal of Nutrition & Food Sciences

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