Lipid polymorphism

Cross Section view of the structures that can be formed by phospholipids in aqueous solutions

Inverted hexagonal H-II phase (H), inverted spherical micellar phase (M), lamellar liposomal phase (le) structures in cold-exposed aqueous dispersions of total lipid extract of spinach thylakoid membranes, studied by negative staining (2% phosphotungstic acid) transmission electron microscopy.

Polymorphism in biophysics is the ability of lipids to aggregate in a variety of ways, giving rise to structures of different shapes, known as "phases". This can be in the form of spheres of lipid molecules (micelles), pairs of layers that face one another (lamellar phase, observed in biological system as a lipid bilayer), a tubular arrangement (hexagonal), or various cubic phases (Fd3m, Im3m, Ia3m, Pn3m, and Pm3m being those discovered so far). More complicated aggregations have also been observed, such as rhombohedral, tetragonal and orthorhombic phases.

单词	Lipid polymorphism
释义	Lipid polymorphism 英语百科 Lipid polymorphism Polymorphism in biophysics is the ability of lipids to aggregate in a variety of ways, giving rise to structures of different shapes, known as "phases". This can be in the form of spheres of lipid molecules (micelles), pairs of layers that face one another (lamellar phase, observed in biological system as a lipid bilayer), a tubular arrangement (hexagonal), or various cubic phases (Fd3m, Im3m, Ia3m, Pn3m, and Pm3m being those discovered so far). More complicated aggregations have also been observed, such as rhombohedral, tetragonal and orthorhombic phases.
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