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    Phase behavior and miscibility in lipid monolayers containing glycolipids

    Year: 2022

    Journal: J. Colloid Interface Sci., Volume 615, JUN, page 786–796

    Authors: Mukhina, Tetiana; Brezesinski, Gerald; Shen, Chen; Schneck, Emanuel

    Organizations: German Research Foundation (DFG) [SCHN 1396/1, SCHN 1396/2]

    Keywords: Glycolipid-enriched domains; Phospholipid; Langmuir monolayer; Phase diagram; Phase behaviour; Langmuir isotherm; Brewster-angle microscopy; Grazing-incidence X-ray diffraction

    Hypothesis: Glycolipids in biological membranes are ubiquitous and believed to be involved in the forma-tion of ordered functional domains. However, our current knowledge about such glycolipid-enriched domains is limited because they are inherently difficult to characterize. Experiments: We use grazing-incidence X-ray diffraction, isotherm measurements, and Brewster angle microscopy to investigate the phase behavior and miscibility in Langmuir lipid monolayers containing glycolipids. Findings: Glycolipid-enriched domains give rise to distinct diffraction patterns that allow for a systematic structural investigation and reveal a rich phenomenology, ranging from near-complete demixing to the formation of mixed domains with unique features. The phase behavior is governed by the headgroup chemistry and by the length and saturation of the tails. (c) 2022 Elsevier Inc. All rights reserved.
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