phospholipid bilayer

phospholipid bilayer
A lamellar organization of phospholipids that are packed as a bilayer with hydrophobic acyl tails inwardly directed and polar head groups on the outside surfaces. It is this bilayer that forms the basis of membranes in cells, though in most cellular membranes a very substantial proportion of the area may be occupied by integral proteins. The triple-layered appearance of membranes seen in electron microscopy is thought to arise because the osmium tetroxide binds to the polar regions leaving a central, unstained, hydrophobic region.

Dictionary of molecular biology. 2004.

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  • Phospholipid-Bilayer — Biomembranen dienen als Trennschicht (Membranen) zwischen verschiedenen Bereichen innerhalb einer lebenden Zelle oder auch zwischen dem Inneren einer Zelle und dem Zellaußenraum (im Falle der Zellmembran). Innerhalb der Zelle trennen Biomembranen …   Deutsch Wikipedia

  • phospholipid bilayer — a two layered arrangement of phosphate and lipid molecules that form a cell membrane, the hydrophobic lipid ends facing inward and the hydrophilic phosphate ends facing outward. Also called lipid bilayer. * * * …   Universalium

  • phospholipid bilayer — a two layered arrangement of phosphate and lipid molecules that form a cell membrane, the hydrophobic lipid ends facing inward and the hydrophilic phosphate ends facing outward. Also called lipid bilayer …   Useful english dictionary

  • phospholipid — /fos foh lip id/, n. Biochem. any of a group of fatty compounds, as lecithin, composed of phosphoric esters, and occurring in living cells. Also called phosphatide, phospholipide /fos foh lip uyd/, phospholipin /fos foh lip in/. [1925 30; PHOSPHO …   Universalium

  • Phospholipid — Phospholipids are a class of lipids and are a major component of all biological membranes. All phospholipids contain a diglyceride, a phosphate group, and a simple organic molecule such as choline. TOC Amphipathic characterThe head of a… …   Wikipedia

  • bilayer — noun Date: 1963 a film or membrane with two molecular layers < a bilayer of phospholipid molecules > • bilayer adjective …   New Collegiate Dictionary

  • bilayer — bi·lay·er bī .lā ər, .le( ə)r n a film or membrane with two molecular layers <a bilayer of phospholipid molecules> bilayer adj * * * bi·lay·er (biґla ər) a membrane consisting of two molecular layers, such as the cell membrane or the… …   Medical dictionary

  • lipid bilayer — phospholipid bilayer the structure common to all biological membranes, consisting of two layers of phospholipids with their hydrophilic head groups exposed to the aqueous medium and hydrophobic tails directed inward. Lipid bilayer, a fluid… …   Medical dictionary

  • bilayer — ¦bīˌ noun Etymology: bi (I) + layer : a film or membrane with two molecular layers a bilayer of phospholipid molecules • bilayer adjective …   Useful english dictionary

  • Bilayer — Eine Doppellipidschicht (oder Lipiddoppelschicht) ist eine Struktur, die viele amphiphile Lipide bei der Mischung mit einem polaren Lösungsmittel (z. B. Wasser) bilden. Bei der Mischung mit einem apolaren Lösungsmittel (z. B. Öl) bildet sich eine …   Deutsch Wikipedia

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