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Definition of phenylalanine - 4 dictionary results
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phen⋅yl⋅al⋅a⋅nine

  [fen-l-al-uh-neen, -nin, feen-]
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–noun Biochemistry.
a crystalline, water-soluble, essential amino acid, C6H5CH2CH(NH2)COOH, necessary to the nutrition of humans and most animals, obtained chiefly from egg white or skim milk. Abbreviation: Phe; Symbol: F
Also called phen⋅yl⋅a⋅mi⋅no⋅pro⋅pi⋅on⋅ic ac⋅id  [fen-l-uh-mee-noh-proh-pee-on-ik, -am-uh-noh-, feen-, fen-l-uh-mee-noh-, -am-uh-noh-, feen-] .

Origin:
1880–85; phenyl + alanine
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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phen·yl·al·a·nine   (fěn'əl-āl'ə-nēn', fē'nəl-)   
n.  An essential amino acid, C9H11NO2, that occurs as a constituent of many proteins and is normally converted to tyrosine in the human body. It is necessary for growth in infants and for nitrogen equilibrium in adults.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: phe·nyl·al·a·nine
Pronunciation: "fen-&l-'al-&-"nEn, "fEn-
Function: noun
: an essential aminoacid C9H11NO2 that is obtained in its levorotatory L-form by the hydrolysis of proteins (as lactalbumin), that is essential in human nutrition,and that is converted in the normal body to tyrosine —abbreviation Phe; —see PHENYLKETONURIA, PHENYLPYRUVIC ACID
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

phenylalanine phen·yl·al·a·nine (fěn'əl-āl'ə-nēn', fē'nəl-)
n.
Abbr. Phe
An essential amino acid that occurs as a constituent of many proteins and is normally converted to tyrosine in the body.

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