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Membrane lipids are a group of compounds (structurally similar to fats and oils) which form the lipid bilayer of the cell membrane. The three major classes of membrane lipids are phospholipids, glycolipids, and cholesterol. Lipids are amphiphilic: they have one end that is soluble in water ('polar') and an ending that is soluble in fat ...
Lipid bilayers are large enough structures to have some of the mechanical properties of liquids or solids. The area compression modulus K a, bending modulus K b, and edge energy , can be used to describe them. Solid lipid bilayers also have a shear modulus, but like any liquid, the shear modulus is zero for fluid bilayers. These mechanical ...
Illustration of a eukaryotic cell membrane Comparison of a eukaryotic vs. a prokaryotic cell membrane. The cell membrane (also known as the plasma membrane or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates and protects the interior of a cell from the outside environment (the extracellular space).
Membrane lipid – Lipid molecules on cell membrane; Lipidomics – Study of complete lipid profile in organisms Lipidome – Totality of lipids in cells; Protein–lipid interaction; Phenolic lipid – Class of organic compounds, a class of natural products composed of long aliphatic chains and phenolic rings that occur in plants, fungi and ...
Cross-sectional view of the structures that can be formed by phospholipids in an aqueous solution. A biological membrane, biomembrane or cell membrane is a selectively permeable membrane that separates the interior of a cell from the external environment or creates intracellular compartments by serving as a boundary between one part of the cell and another.
Liposomes are most often composed of phospholipids, [4] especially phosphatidylcholine, and cholesterol, [2] but may also include other lipids, such as those found in egg and phosphatidylethanolamine, as long as they are compatible with lipid bilayer structure. [5] A liposome design may employ surface ligands for attaching to desired cells or ...
A clear cell's plasma membrane is highly folded, more so on the apical and lateral surfaces. The cytoplasm of clear cells contains large amounts of glycogen and many mitochondria. Melanocytes appear as clear cells when in the stratum basale of the skin, and Langerhans' cells appear as clear cells in the stratum spinosum. [2]
The lipid components of lipoproteins are insoluble in water. However, because of their detergent-like ( amphipathic ) properties, apolipoproteins and other amphipathic molecules (such as phospholipids ) can surround the lipids, creating a lipoprotein particle that is itself water-soluble, and can thus be carried through body fluids (i.e., blood ...