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enkephalin

[en-kef-uh-lin] /ɛnˈkɛf ə lɪn/
noun, Biochemistry
1.
either of two pentapeptides that bind to morphine receptors in the central nervous system and have opioid properties of relatively short duration; one pentapeptide (Met enkephalin) has the amino acid sequence Tyr-Gly-Gly-Phe-Met and the other (Leu enkephalin) has the sequence Tyr-Gly-Gly-Phe-Leu.
Origin
1970-1975
1970-75; < Greek enképhal(os) encephalon + -in2
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for enkephalin

enkephalin

/ɛnˈkɛfəlɪn/
noun
1.
a chemical occurring in the brain, having effects similar to those of morphine See also endorphin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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enkephalin in Medicine

enkephalin en·keph·a·lin (ěn-kěf'ə-lĭn)
n.
Either of two closely related pentapeptides having opiate qualities and occurring especially in the brain and spinal cord.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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