ArticleBiophysical journal2014
Critical behaviour in DOPC/DPPC/cholesterol mixtures: static (2)H NMR line shapes near the critical point.
Article in Biophysical journal, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Cholesterol in model membranes.Biophysical reviews · 2025Review
- An NMR Study on Hydration and Molecular Interaction of Phytantriol-Based Liquid Crystals.Pharmaceutics · 2022Article
- Regimes of Complex Lipid Bilayer Phases Induced by Cholesterol Concentration in MD Simulation.Biophysical journal · 2018Article
- Revealing the mechanism of passive transport in lipid bilayers via phonon-mediated nanometre-scale density fluctuations.Nature communications · 2016Article
- On scattered waves and lipid domains: detecting membrane rafts with X-rays and neutrons.Soft matter · 2015Article
- In situ determination of structure and fluctuations of coexisting fluid membrane domains.Biophysical journal · 2015Article
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2 authors.
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Abstract
Static (2)H NMR spectroscopy is used to study the critical behavior of mixtures of 1,2-dioleoyl-phosphatidylcholine/1,2-dipalmitoyl-phosphatidylcholine (DPPC)/cholesterol in molar proportion 37.5:37.5:25 using either chain perdeuterated DPPC-d62 or chain methyl deuterated DPPC-d6. The temperature dependence of the first moment of the (2)H spectrum of the sample made with DPPC-d62 and of the quadrupolar splittings of the chain-methyl-labeled DPPC-d6 sample are directly related to the temperature dependence of the critical order parameter η, which scales as [Formula: see text] near the critical temperature. Analysis of the data reveals that for the chain perdeuterated sample, the value of Tc is 301.51 ± 0.1 K, and that of the critical exponent, βc = 0.391 ± 0.02. The line shape analysis of the methyl labeled (d6) sample gives Tc = 303.74 ± 0.07 K and βc = 0.338 ± 0.009. These values obtained for βc are in good agreement with the predictions of a three-dimensional Ising model. The difference in critical temperature between the two samples having nominally the same molar composition arises because of the lowering of the phase transition temperature that occurs due to the perdeuteration of the DPPC.
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