tyrosine

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Related to L-tyrosine: 5-htp

tyrosine

 [ti´ro-sēn]
a naturally occurring, nonessential amino acid present in most proteins and synthesized metabolically from phenylalanine. It is a precursor of melanin, catecholamines, and thyroid hormones.

ty·ro·sine (Tyr, Y),

(tī'rō-sēn, -sin),
2-Amino-3-(4-hydroxyphenyl)propionic acid; 3-(4-hydroxyphenyl)alanine; the l-isomer is an α-amino acid present in most proteins.

tyrosine

(tī′rə-sēn′)
n.
A nonessential amino acid, C9H11NO3, that is produced in the body from phenylalanine and is a precursor of melanin and of several neurotransmitters and hormones, such as epinephrine and thyroxine.

ty·ro·sine

(Tyr, Y) (tī'rō-sēn)
An α-amino acid present in most proteins.

tyrosine

The AMINO ACID 4-hydroxyphenylalanine. This is one of the 20 amino acids that are incorporated into protein.
Tyrosineclick for a larger image
Fig. 308 Tyrosine . Molecular structure.

tyrosine (Y, Tyr)

one of the 20 AMINO ACIDS common in PROTEINS. It has a polar ‘R’ group structure and is soluble in water. See Fig. 308 . The ISOELECTRIC POINT of tyrosine is 5.7.

Tyrosine

A protein building block found in a wide variety of foods that is used by the body to make melanin.
Mentioned in: Albinism

ty·ro·sine

(Tyr) (tī'rō-sēn)
An α-amino acid present in most proteins.
References in periodicals archive ?
The development of melanin from L-tyrosine through L-dopa is one of its key roles.
In addition, L-tyrosine, that has potentiated Rap biosynthesis, has also favoured the growth.
Immobilization of tyrosinase is used to convert L-tyrosine to L-DOPA by entrapment into either polymer, natural polymer, or modified polystyrene or adsorption on nylon zeolite [161], glass beads, fuller's earth, and chitin activated with hexamethylenediamine [162].
Mushroom tyrosinase (EC1.14.18.1), Dimethyl sulfoxide (DMSO), L-tyrosine (L-Tyr), L-3, 4-dihydroxyphenylalanine (L-DOPA), and [alpha]-melanocyte stimulating hormone ([alpha]-MSH) were purchased from Sigma (St.
(48)-(50) TPL normally catalyzes the [alpha],[beta]-elimination reaction of L-tyrosine to produces pyruvate, ammonia and phenol (Fig.
None of the diterpenoids inhibited the tyrosinase-catalyzed oxidation of L-tyrosine or L-DOPA in a cell free experiment up to 200 [mu]M even when the reaction time was extended up to 60 min.
Participants were given capsules that contained Acerola Cherry, Alpha Lipoic Acid (flax extract), B vitamins (food source), Bovine Brain, Bovine Medulla, Bovine Pancreas, Bovine Pituitary, Bovine Trachea, Corn Silk, Deoxyribonucleic Acid (wild salmon extract), Eleuthero Root, Flaxseeds, Grape Seed Extract (92% proanthocyanidins), L-Carnosine (fermented grain extractgluten free), L-Methionine (fermented grain extractgluten free), L-Tyrosine (fermented bean source), Lecithin (bean source), and Ribonucleic Acid (Saccharomyces cerevisae extract).
Glycine (gly), L-Serine (ser), L-Cysteine (cys), L-Glutamic acid (glu), L-Histidine (his) and L-Tyrosine (tyr) were bought from Fluka.
Oxygenase activity of PO was monitored in a U-721 spectrophotometer at 490 nm by dopachrome formation accompanying the oxidation of the substrate (L-tyrosine or L-3, 4-dihydroxyphenylalanine [l-DOPA]).
You can easily help dopamine production with L-tyrosine, B complex, and a multimineral.
Wake Up On Time, billed as "the alarm clock in a bottle," contains B vitamins, Siberian ginseng, L-tyrosine and guarana seed extract.
Value of O-(2-[18F]fluoroethyl)- L-tyrosine PET for the diagnosis of recurrent glioma.