phenylalanine


phenylalanine
/fen'l al"euh neen', -nin, feen'-/, n. Biochem.
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. Abbr.: Phe; Symbol: F Also called phenylaminopropionic acid /fen"l euh mee"noh proh pee on"ik, -am"euh noh-, feen"-, fen'l euh mee'noh-, -am'euh noh-, feen'-/.
[1880-85; PHENYL + ALANINE]

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One of the essential amino acids, present in many common proteins, especially hemoglobin.

It is used in medicine and nutrition and as one of the two amino acids making up aspartame. Persons with phenylketonuria do not metabolize phenylalanine properly and must adhere to a diet free of it.

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      an amino acid present in the mixture obtained upon hydrolysis of common proteins. Human hemoglobin (the oxygen-carrying pigment of red blood cells) is one of the richest sources of phenylalanine, yielding 9.6 percent by weight. First isolated in 1881 from lupine seedlings, phenylalanine is one of several essential amino acids for fowls and mammals; i.e., they cannot synthesize it and require dietary sources. Microorganisms synthesize it from glucose and pyruvic acid (products of the breakdown of carbohydrates).

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Universalium. 2010.

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  • phénylalanine — [ fenilalanin ] n. f. • 1897; de phényl et alanine ♦ Biochim. Composé aromatique, l un des vingt acides aminés constituants des protéines. ● phénylalanine nom féminin Acide aminé essentiel, cyclique, très répandu, obtenu par hydrolyse de… …   Encyclopédie Universelle

  • phenylalanine — phenylalanine. См. фенилаланин [Фен]. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • phenylalanine — [fen΄əl al′ə nēn΄, fē΄nəlal′ə nēn΄] n. an essential amino acid, C6H5CH2CH(NH2)COOH, occurring in proteins: see AMINO ACID …   English World dictionary

  • Phenylalanine — Phe redirects here. For other uses, see Phe (disambiguation). Phenylalanine …   Wikipedia

  • phenylalanine — 2 Amino 3 phenylpropionic acid; the l isomer is one of the common amino acid s in proteins; a nutritionally essential amino acid. p. ammonia lyase a nonmammalian enzyme that catalyzes the conversion of l p. to trans cinnamate and ammonia; it has… …   Medical dictionary

  • phenylalanine — n. an essential amino acid that is readily converted to tyrosine. Blockade of this metabolic pathway gives rise to phenylketonuria, which is associated with abnormally large amounts of phenylalanine and phenylpyruvic acid in the blood and… …   The new mediacal dictionary

  • phenylalanine — fenilalaninas statusas T sritis chemija formulė C₆H₅CH₂CH(NH₂)COOH santrumpa( os) Phe, F atitikmenys: angl. phenylalanine rus. фенилаланин ryšiai: sinonimas – 2 amino 3 fenilpropano rūgštis …   Chemijos terminų aiškinamasis žodynas

  • phenylalanine — noun Etymology: International Scientific Vocabulary Date: circa 1883 an essential amino acid C9H11NO2 that is converted in the normal body to tyrosine …   New Collegiate Dictionary


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