noun Biochemistry.
a dipolar compound that occurs in muscle and liver and is involved in the transport of fatty acids across the inner mitochondrial membrane.

1920–25; < German Carnitin, equivalent to Latin carni- (combining form of carō, genitive carnis meat, flesh) + -tin apparently arbitrarily chosen suffix (cf. -in2, -ine2); so called because it was first isolated in meat extract Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

carnitine car·ni·tine (kär'nĭ-tēn')
A betaine commonly occurring in the liver and in skeletal muscle that functions in the transport of fatty acids across mitochondrial membranes.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
carnitine   (kär'nĭ-tēn')  Pronunciation Key 
A betaine commonly occurring in the liver and in skeletal muscle that is essential for fatty acid transport across mitochondrial membranes. Chemical formula: C7H15NO3.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica


a water-soluble, vitamin-like compound related to the amino acids. It is an essential growth factor for mealworms and is present in striated (striped) muscle and liver tissue of higher animals. Carnitine, which can be synthesized by the higher animals, is associated with the transfer of fatty substances from the bloodstream to active sites of fatty-acid oxidation within muscle cells. It regulates the rate of oxidation of fatty acids and may afford the means by which a cell can rapidly shift its metabolic patterns (e.g., from fat synthesis to fat breakdown)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Treatment consists of cobalamin and carnitine supplements and a low-protein diet.
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