phenylalanine

phenylalanine

 [fen″il-al´ah-nīn]

a naturally occurring amino acid, one of the essential amino acids, necessary for optimal growth in infants and for nitrogen equilibrium in adults.

Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

phen·yl·al·a·nine (Phe, F),

(fen'il-al'ă-nēn),

2-Amino-3-phenylpropionic acid; the l-isomer is one of the common amino acids in proteins; a nutritionally essential amino acid.

Farlex Partner Medical Dictionary © Farlex 2012

phenylalanine

(fĕn′əl-ăl′ə-nēn′, fē′nəl-)

n.

An essential amino acid, C₉H₁₁NO₂, that occurs as a constituent of many proteins and is converted to tyrosine in the body.

The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

phenylalanine

Alternative pharmacology
A 50:50 mixture of dextro- and levo-forms of the amino acid phenylalanine, which is present in meats and cheeses. Phenylalanine is claimed to reverse ageing by boosting the internal supply of norepinephrine, and is allegedly useful for fatigue, depression, pain and other age-related phenomena. There is no peer-reviewed scientific evidence to support its alleged effects and benefits.

Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

phen·yl·al·a·nine

(fen'il-al'ă-nēn)

One of the common amino acids in proteins; a nutritionally essential amino acid.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

phenylalanine

One of the 20 AMINO ACIDS from which proteins are constructed. Phenylalanine is an essential amino acid and cannot be synthesized in the body; it must be provided in the diet.

Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

Fig. 251 Phenylananine . Molecular structure.

phenylalanine (F, Phe)

one of 20 AMINO ACIDS common in proteins, which has a NONPOLAR'R’ structure and is relatively insoluble in water.

The ISOELECTRIC POINT of phenylalanine is 5.5.see PHENYLKETONURIA.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Phenylalanine

An essential amino acid that must be obtained from food since the human body cannot manufacture it.

Mentioned in: Phenylketonuria

Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

phen·yl·al·a·nine

(F) (fen'il-al'ă-nēn)

One of the common amino acids in proteins; a nutritionally essential amino acid.

Medical Dictionary for the Dental Professions © Farlex 2012