| Tyrophagus putrescentiae | One of the grain mite species that cause various forms of dermatitis resulting from infestation by grain mites in food and produce, which sensitises and causes dermatitis in storage and handling personnel. Synonym: Tyroglyphus longior. Origin: G. Tyros, cheese, + phago, to eat (05 Mar 2000) |
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| 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) |
| 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 |
b -(r -Hydroxyphyl) adanine ? C 9 H 11 NO 3 an amino acid widely distributed in proteins; a precursor of epinephrine, thyroxine and melanin
출처: members.ozemail.com.au/~lindafrd/page20.html
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| tyrosine |
A variety of tiny wild grass found in parts of Central and South America that is believed to be the ancestor of modern day corn.
출처: www.natureshift.org/Whawk/glossaryT-Z.html
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| tympanometry |
A test in which sound and air pressure are used to check for fluid in the middle ear.
출처: www.cchs.net/health/health-info/docs/1900/1945.asp
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| tympanum |
The triangular space above a door, sometimes containing a window.
출처: www.thestorefinder.com/glass/library/terms/termsT....
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| type |
A data element may contain data values of the following types: character, date, integer, time, real, etc. Definitions for the types currently in use are given below; other definitions will be added as needed. Alpha: all items in this field type are letters of the alphabet; no other ASCII characters are included. Character: items in this field type can include any of the ASCII characters, such as letters of the alphabet, numbers, punctuation markings, etc. ...
출처: www.fws.gov/stand/standards/defterms.html
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