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- W2153449715 abstract "Composition and phase dependence of the mixing of 1,2-Dipalmitoyl- sn -glycero-3-phosphocholine (DPPC), and 1,2-Dioleoyl- sn -glycero-3-phosphocholine (DOPC), with the oxidized phospholipid, 1-palmitoyl-2-glutaryl- sn -glycero-3-phosphocholine (PGPC) were investigated by characterizing the aggregation states of DPPC/PGPC and DOPC/PGPC using a fluorescence quenching assay, dynamic light scattering, and time-resolved fluorescence quenching in the temperature range 5–60 °C. PGPC forms 3.5 nm radii micelles of aggregation number 33. In the gel phase, DPPC and PGPC fuse to form mixed vesicles for PGPC molar fraction, X PGPC ≤ 0.3 and coexisting vesicles and micelles at higher X PGPC . Data suggest that liquid phase DPPC at 50 °C forms mixed vesicles with segregated or hemi fused DPPC and PGPC for X PGPC ≤ 0.3. At 60 °C, DPPC and PGPC do not mix, but form coexisting vesicles and micelles. DOPC and PGPC do not mix in any proportion in the liquid phase. Two dissimilar aggregates of the sizes of vesicles and PGPC micelles were observed for all X PGPC for T ≥ 22 °C. DOPC–PGPC and DPPC–PGPC mixing is non-ideal for X PGPC > 0.3 in both gel and fluid phases resulting in exclusion of PGPC from the bilayer. Formation of mixed vesicles is favored in the gel phase but not in the liquid phase for X PGPC ≤ 0.3. For X PGPC ≤ 0.3, aggregation states change progressively from mixed vesicles in the gel phase to component segregated mixed vesicles in the liquid phase close to the chain melting transition temperature to separated coexisting vesicles and micelles at higher temperatures. • Mixing of oxidized and bilayer phospholipids is non-ideal in the bilayer fluid phase. • Mixed phospholipid vesicles form up to a limited composition in the gel phase. • Mixtures separate into micelles and vesicles at high temperatures in the fluid phase. • Laterally separated mixed lipid bilayers form at low temperatures in the fluid phase." @default.
- W2153449715 created "2016-06-24" @default.
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- W2153449715 date "2015-07-01" @default.
- W2153449715 modified "2023-09-29" @default.
- W2153449715 title "Mixing of oxidized and bilayer phospholipids" @default.
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- W2153449715 doi "https://doi.org/10.1016/j.bbamem.2015.03.027" @default.
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