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lecithin
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lecithin
lecithin Model of the structure of lecithin.

lecithin

biochemistry
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Also known as: phosphatidyl choline
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Also called:
Phosphatidyl Choline
Key People:
Ernst Felix Hoppe-Seyler

lecithin, any of a group of phospholipids (phosphoglycerides) that are important in cell structure and metabolism. Lecithins are composed of phosphoric acid, cholines, esters of glycerol, and two fatty acids; the chain length, position, and degree of unsaturation of these fatty acids vary, and this variation results in different lecithins with different biological functions. Pure lecithin is white and waxy and darkens when exposed to air. Commercial lecithin is brown to light yellow, and its consistency varies from plastic to liquid. The term lecithin is also used for a mixture of phosphoglycerides containing principally lecithin, cephalin (specifically phosphatidyl ethanolamine), and ...(100 of 159 words)

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