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- W2023541238 endingPage "177" @default.
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- W2023541238 abstract "The surface properties of liposomes composed by saturated phosphatidylcholines and their mixtures with cholesterol in the gel state have been studied using merocyanine 540 as a fluorescent and optical probe. A new absorption peak at 450 nm and a new fluorescent band at 630 nm were observed when the dye was added to suspensions of DMPC multilamellar liposomes in the gel state. These peaks were also observed in membranes with different lipid compositions in which the Pβ′ and the Lβ′ phases were present. The increase of temperature above the main transition temperature of DMPC or the incorporation of 35% cholesterol into DMPC bilayers at 13°C caused the disappearance of these peaks. The changes in the absorption and fluorescent spectra upon addition of cholesterol resembles very well the phase diagrams reported by Mortensen et al. ((1988) Biochim. Biophys. Acta 945, 221–245) indicating that the corrugated structures characteristic of the Lβ′ and the Pβ′ phases have different surface properties related to the partitioning of amphiphilic dies." @default.
- W2023541238 created "2016-06-24" @default.
- W2023541238 creator A5006597509 @default.
- W2023541238 creator A5074177133 @default.
- W2023541238 date "1993-03-01" @default.
- W2023541238 modified "2023-10-16" @default.
- W2023541238 title "Gel state surface properties of phosphatidylcholine liposomes as measured with merocyanine 540" @default.
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- W2023541238 doi "https://doi.org/10.1016/0005-2736(93)90352-z" @default.
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