| BTK | Bruton tyrosin kinase |
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| TOH | tyrosin hydroxylase |
| tyrosin | <physiology> A white crystalline nitrogenous substance present in small amount in the pancreas and spleen, and formed in large quantity from the decomposition of proteid matter by various means, as by pancreatic digestion, by putrefaction as of cheese, by the action of boiling acids, etc. Chemically, it consists of oxyphenol and amidopropionic acid, and by decomposition yields oxybenzoic acid, or some other benzol derivative. Alternative forms: tyrosine. Origin: Gr. Cheese. Source: Websters Dictionary (01 Mar 1998) |
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| tyrosinaemia | A disorder consisting of elevated blood concentrations of tyrosine, enhanced urinary excretion of tyrosine and tyrosyl compounds, hepatosplenomegaly, nodular cirrhosis of the liver, multiple renal tubular reabsorptive defects, and vitamin D-resistant rickets; autosomal recessive inheritance. Synonym: hypertyrosinaemia. Origin: tyrosine + G. Haima, blood (05 Mar 2000) |
| tyrosinase | <enzyme> A copper containing protein (a monoxygenase) that catalyses the oxidation of tyrosine and sets in train spontaneous reactions that yield melanin, the black pigment of skin, hair and eyes. The first intermediate is 3, 4 dihydroxyphenylalanine (DOPA). Lack of tyrosinase activity is responsible for albinism. (18 Nov 1997) |
| tyrosine | <amino acid> One of the twenty amino acids directly coded in proteins. Nonessential in humans since can be synthesised from phenylalanine. (18 Nov 1997) |
| tyrosine 3-monooxygenase | <enzyme> An enzyme that catalyses the conversion of l-tyrosine, tetrahydrobiopterin, and oxygen to 3,4-dihydroxy-l-phenylalanine, dihydrobiopterin, and water. Chemical name: L-Tyrosine,tetrahydrobiopterin:oxygen oxidoreductase (3-hydroxylating) Registry number: EC 1.14.16.2 (12 Dec 1998) |
| tyrosine aminotransferase | <enzyme> An enzyme that catalyses the reversible reaction of l-tyrosine and alpha-ketoglutarate producing p-hydroxyphenylpyruvate and l-glutamate; this enzyme catalyses a step in l-phenylalanine and l-tyrosine catabolism; a deficiency of this enzyme is associated with tyrosinaemia II. Synonym: tyrosine transaminase. (05 Mar 2000) |
| tyrosine decarboxylase | <enzyme> A pyridoxal-phosphate protein that catalyses the conversion of l-tyrosine to tyramine and carbon dioxide. The bacterial enzyme also acts on 3-hydroxytyrosine and, more slowly, on 3-hydroxyphenylalanine. Chemical name: L-Tyrosine carboxy-lyase Registry number: EC 4.1.1.25 (12 Dec 1998) |
| tyrosine hydroxylase | <enzyme> Enzyme required for the synthesis of the neurotransmitters noradrenaline and dopamine. (18 Nov 1997) |
| tyrosine iodinase | A postulated enzyme in the thyroid catalyzing iodination of tyrosine, a reaction important in the eventual biosynthesis of thyroxine. See: peroxidases. (05 Mar 2000) |
| tyrosine kinase | <enzyme> Kinases that phosphorylate protein tyrosine residues. These kinases play major roles in mitogenic signalling and can be divided into two subfamilies: receptor tyrosine kinases, that have an extracellular ligand binding domain, a single transmembrane domain and an intracellular tyrosine kinase domain and nonreceptor tyrosine kinases, which are soluble, cytoplasmic kinases. (18 Nov 1997) |
| tyrosine N-monooxygenase | <enzyme> Catalyses the n-hydroxylation of l-tyrosine to n-hydroxytyrosine Registry number: EC 1.14.13.41 Synonym: tyrosine n-hydroxylase, haemthiolate enzyme, cytochrome p450(tyr), cyp79 protein (26 Jun 1999) |
| tyrosine phenol-lyase | <enzyme> An enzyme that catalyses the cleavage of tyrosine to phenol, pyruvate, and ammonia. It is a pyridoxal phosphate protein. The enzyme also forms pyruvate from d-tyrosine, l-cysteine, s-methyl-l-cysteine, l-serine, and d-serine, although at a slower rate. Chemical name: L-Tyrosine phenol-lyase (deaminating) Registry number: EC 4.1.99.2 (12 Dec 1998) |
| tyrosine phosphorylation | <enzyme> Kinases that phosphorylate protein tyrosine residues. These kinases play major roles in mitogenic signalling and can be divided into two subfamilies: receptor tyrosine kinases, that have an extracellular ligand binding domain, a single transmembrane domain and an intracellular tyrosine kinase domain and nonreceptor tyrosine kinases, which are soluble, cytoplasmic kinases. (18 Nov 1997) |
| tyrosine transaminase | <enzyme> An enzyme that catalyses the conversion of l-tyrosine and 2-oxoglutarate to 4-hydroxyphenylpyruvate and l-glutamate. It is a pyridoxal-phosphate protein. L-phenylalanine can act instead of l-tyrosine. The mitochondrial enzyme may be identical with aspartate transaminase (ec 2.6.1.1.). Chemical name: L-Tyrosine:2-oxoglutarate aminotransferase Registry number: EC 2.6.1.5 (12 Dec 1998) |
| tyrosine-ester sulfotransferase | <enzyme> Also acts on phenols and organic hydroxylamines Registry number: EC 2.8.2.9 Synonym: arylsulfotransferase iv (26 Jun 1999) |
Synonyms : L-Tyrosine, Tyrosine, L-isomer, para-Tyrosine, L Tyrosine, Tyrosine, L isomer, para Tyrosine
Synonyms : 3-Monooxygenase, Tyrosine, Hydroxylase, Tyrosine, Tyrosine 3 Monooxygenase
Synonyms : Decarboxylase, Tyrosine
Synonyms : Phenol-Lyase, Tyrosine, Tyrosine Phenol Lyase, beta Tyrosinase
Synonyms : Aminotransferase, Tyrosine, Transaminase, Tyrosine
| tyrosine |
an amino acid found in most proteins; a precursor of several hormones
Ãâó: wordnet.princeton.edu/perl/webwn
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| tyrosinemia |
autosomal recessive defect in tyrosine metabolism resulting in liver and kidney disturbances and mental retardation
Ãâó: wordnet.princeton.edu/perl/webwn
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| tyrosinase |
Tyrosinase is required for melanin biosynthesis, and the expression of its gene leads to pigment production, and is therefore used as a coat-colour marker.
Ãâó: www.nature.com/nrg/journal/v2/n10/glossary/nrg1001...
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| tyrosine |
a protein used by the body to produce melanin.
Ãâó: www.magnoliaspa.com/beauty-secrets/beauty_terms/be...
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| tyrosine |
An amino acid and the precursor to the neurotransmitters dopamine and noradrenaline.
Ãâó: www.third-plateau.org/faq/dxm_glossary.shtml
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| tyrosin | an amino acid found in most proteins |
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| tyrosin | a drug used in cases of chronic myeloid leukemia |
| tyrosin | autosomal recessive defect in tyrosine metabolism resulting in liver and kidney disturbances and mental retardation |
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