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- W1997314733 abstract "Synthesis and physical properties of a new anthracene fatty acid, 9-(2-anthryl)nonanoic acid, and the corresponding anthracene-phosphatidylcholines which were obtained by condensing the acid with sn-1-palmitoyl-lysophosphatidylcholine (PAPC) and with egg lysophosphatidylcholine (EAPC) are described. Differential scanning calorimetry experiments show that these lipids can undergo a liquid-crystal to gel phase transition at temperatures of 15°C and 18°C for EAPC and PAPC, respectively. In monolayers, PAPC exhibits a compression curve nearly superimposable to that of dipalmitoylphosphatidylcholine (DPPC), with a molecular area of 0.48 nm2 at π = 30 mN m−1. The data indicate that in these lipids, the anthracene group is only slightly more bulky than a normal acyl chain and that it does not significantly affect the regular phospholipid molecular packing. In ethanol solutions or when incorporated into egg phosphatidylcholine liposomes in a molar ratio of 1%, these lipids display UV absorption spectra and fluorescence emission spectra similar to those of 2-methyl anthracene. For EAPC liposomes, a broad and structureless fluorescence emission spectrum centered at around 450 nm, was recorded, suggesting the occurrence of anthracene excimers. As ascertained by UV spectrophotometry, differential scanning calorimetry, fluorescence polarization and anthracene photodimerization experiments, EAPC displays good miscibility properties with lipids in the liquid state (egg phosphatidylcholine) or in the gel state (distearoylphosphatidylcholine (DSPC)). The potential of these anthracene derivatives for studying the dynamics and the topological distribution of lipids in biomembranes is discussed." @default.
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- W1997314733 date "1983-03-01" @default.
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- W1997314733 title "Synthesis and physical properties of phosphatidylcholine labelled with 9-(2-anthryl)nonanoic acid, a new fluorescent probe" @default.
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- W1997314733 doi "https://doi.org/10.1016/0009-3084(83)90046-4" @default.
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