lipid bilayer

(redirected from Lipid asymmetry)
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lipid bilayer

The two layers of phospholipid molecules included within the outer membrane of most cells. These layers are arranged so their two hydrophilic (water-soluble) sides face the interior and the exterior of the cell, and their hydrophobic (nonpolar) core is in between. The membrane is relatively impermeable to molecules such as glucose and amino acids but very permeable to lipid-soluble molecules such as oxygen, carbon dioxide, and alcohol.
See: cell for illus
See also: bilayer
References in periodicals archive ?
They cover assessing the transmembrane movement and asymmetry of lipids, lipid asymmetry in cell membranes, the energy independent protein-mediated transmembrane movement of lipids, energy-dependent lipid transport across membranes, the relevance of lipid transmembrane distribution for membrane properties and processes, and apoptosis and disease as consequences of disruption to lipid transmembrane asymmetry.
2+] inhibited flippase, an enzyme that recovers PS into the inner leaflet of the cell membrane, and activated scramblase, an enzyme that alters lipid asymmetry in the cell membrane.
We measured flippase, an enzyme that recovers PS into the inner leaflet of the cell membrane, and scramblase, an enzyme that disrupts lipid asymmetry in the cell membrane, based on the extent of [C.