Lipid bi-layer: Difference between revisions
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The lipid bi-layer provides a basic impermeable barrier around cells, and is approximately 5nm thick. They help to maintain different environments between cytosol and the extracellular environment/organelles, and also control the transport of solutes between | The lipid bi-layer provides a basic impermeable barrier around [[Cells|cells]], and is approximately 5nm thick. They help to maintain different environments between [[Cytosol|cytosol]] and the extracellular environment/[[Organelles|organelles]], and also control the transport of solutes between compartments. The lipid bilayer consists of four major [[Phospholipids|phospholipids]] which are; phopshatidylethanolamine, [[Phosphatidylserine|phosphatidylserine]], [[Phosphatidycholine|phosphatidycholine]] and [[Sphingomyelin|sphingomyelin]]. These are derived from [[Glycerol|glycerol]] apart from [[Sphingomyelin|sphingomyelin]], which is derived form [[Phosphatidylserine|serine]]. [[Phosphatidylserine|Phosphatidylserine]] is the only one negatively charged <ref name="null">Molecular Biology of the Cell, Alberts et al., 5th Edition (2007) Garland Science, New York Chapter 10 p617-65</ref>. | ||
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Revision as of 16:20, 12 November 2010
The lipid bi-layer provides a basic impermeable barrier around cells, and is approximately 5nm thick. They help to maintain different environments between cytosol and the extracellular environment/organelles, and also control the transport of solutes between compartments. The lipid bilayer consists of four major phospholipids which are; phopshatidylethanolamine, phosphatidylserine, phosphatidycholine and sphingomyelin. These are derived from glycerol apart from sphingomyelin, which is derived form serine. Phosphatidylserine is the only one negatively charged [1].
References
- ↑ Molecular Biology of the Cell, Alberts et al., 5th Edition (2007) Garland Science, New York Chapter 10 p617-65