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.

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.

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.

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.

phen·yl·al·a·nine

(fen'il-al'ă-nēn)

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

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.

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.

Phenylalanine

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

Mentioned in: Phenylketonuria

phen·yl·al·a·nine

(F) (fen'il-al'ă-nēn)

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