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tyrosine

A Dictionary of Biology | 2004 | Â© A Dictionary of Biology 2004, originally published by Oxford University Press 2004. (Hide copyright information) Copyright

tyrosine See amino acid.

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	L-tyrosine.(Monograph)(Clinical report) Magazine article from: Alternative Medicine Review; 12/1/2007; 700+ words ; [ILLUSTRATION OMITTED] Introduction L-tyrosine is a conditionally essential amino acid because...hydroxylase prevents conversion of phenylalanine to tyrosine, making tyrosine an essential amino acid for this population...
	Phenylalanine and Tyrosine Metabolism in Chronic Kidney Failure1-3 Magazine article from: The Journal of Nutrition; 6/1/2007; ; 700+ words ; Abstract In chronic kidney failure, there is impairment in the conversion of phenylalanine to tyrosine. As a result, tyrosine and the tyrosine/phenylalanine ratio are reduced in plasma and many tissues, and phenylalanine concentrations...
	Photophysical Properties of Tyrosine and Its Simple Derivatives in Organic Solvents Studied by Time-resolved Fluorescence Spectroscopy and Global Analysis¶ Magazine article from: Photochemistry and Photobiology; 5/1/2005; ; 700+ words ; ABSTRACT Photophysical properties of tyrosine and its derivatives with free and blocked...intensity decays were observed for all tyrosine derivatives in THF and DMSO solutions...fluorescence and nonradiative rate constants of tyrosine derivatives compared with those of tyrosine...
	Detection of a tyrosine phosphatase LAR on intestinal epithelial cells and intraepithelial lymphocytes in the human duodenum.(RESEARCH COMMUNICATION) Magazine article from: Mediators of Inflammation; 1/1/2005; ; 700+ words ; Studies of tyrosine phosphorylation in the human duodenum...devoid of this feature, suggesting that tyrosine kinase activation is not a dominant factor...proliferation, and that consequently tyrosine phosphatase activity may be a more critical...
	Evaluation of fluorinated m-tyrosine analogs as PET imaging agents of dopamine nerve terminals: Comparison with 6-fluorodopa Magazine article from: The Journal of Nuclear Medicine; 4/1/1997; ; 700+ words ; Fluorinated m-tyrosine analogs were evaluated as PET imaging agents and...dopamine nerve terminals. Methods: The three m-tyrosine analogs, 6-[^sup 18^]fluoro-L-m-tyrosine (6-FMT), 2-[^sup 18^F]fluoro-L...
	Profiling phosphorylation of receptor tyrosine kinases using antibody arrays.(APPLICATION NOTE) Magazine article from: Bioscience Technology; 5/1/2005; ; 700+ words ; ...transmembrane receptors, such as Receptor Tyrosine Kinases (RTKs). RTKs possess intrinsic tyrosine kinase activity that is activated after...resulting in phosphorylation of specific tyrosine residues in its own cytoplasmic domain and...
	An Overview of Phenylalanine and Tyrosine Kinetics in Humans1-3 Magazine article from: The Journal of Nutrition; 6/1/2007; ; 700+ words ; ...phenylalanine was hydroxylated to tyrosine, defining for the first time the...this pathway. Phenylalanine and tyrosine kinetics were not measured in humans...rates of phenylalanine disposal and tyrosine production in relatively normal...
	Parenteral glycyl-L-tyrosine maintains tyrosine pools and supports growth and nitrogen balance in phenylalanine-deficient rats Magazine article from: The Journal of Nutrition; 3/1/1996; ; 700+ words ; In healthy adults, tyrosine is considered a dispensable amino acid...hepatic conversion of phenylalanine to tyrosine is impaired in patients suffering from...ample amounts of phenylalanine can meet tyrosine needs (Kilani et al. 1995). Under...
	Tyrosine kinase inhibitors lower motility by decreasing tyrosine phosphorylation. Magazine article from: Women's Health Weekly; 6/26/2003; 700+ words ; ...Human sperm motility appears to be lowered by tyrosine kinase inhibitors. "Tyrosine phosphorylation has recently been associated...The objective of this study was to verify if tyrosine phosphorylation of human sperm proteins was essentially...
	Unfolding of Ubiquitin Studied by Picosecond Time-Resolved Fluorescence of the Tyrosine Residue Magazine article from: Biophysical Journal; 10/1/2004; ; 700+ words ; ABSTRACT The photophysics of the single tyrosine in bovine ubiquitin (UBQ) was studied by picosecond...three decay times were attributed to the presence of tyrosine, a tyrosine-carboxylate hydrogen-bonded complex, and excited...

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	tyrosine Book article from: The Columbia Encyclopedia, Sixth Edition tyrosine , organic compound, one of the 20 amino...the transformation of phenylalanine to tyrosine is not active because of a hereditary...phenylketonuria (PKU) results. Other defects in tyrosine metabolism include the rare hereditary...
	Phenylketonuria Encyclopedia entry from: Gale Encyclopedia of Children's Health: Infancy through Adolescence ...phenylalanine into another amino acid, tyrosine. This is the only role of PAH in the body...brain makes dopamine from the amino acid tyrosine. PKU patients who do not consume enough tyrosine in their diets cannot produce sufficient...
	amino acids Book article from: A Dictionary of Food and Nutrition ...glutamine, glycine, proline, serine, and tyrosine. Nine amino acids cannot be synthesized...and cystine) from methionine, and tyrosine from phenylalanine. The limiting amino...x2010;chains. Three, phenylalanine, tyrosine, and tryptophan, have aromatic side...
	Phenylketonuria (PKU) Encyclopedia entry from: Complete Human Diseases and Conditions ...into another needed amino acid, tyrosine (TY-ro-seen). Untreated, PKU...phenylalanine to another needed amino acid called tyrosine (TY-ro-seen). If phenylalanine...intake of phenylalanine and provides the tyrosine that the body cannot make. Babies drink...
	Oncogenes Book article from: Genetics ...c-Abl is a nuclear enzyme called "tyrosine kinase," which adds a phosphate molecule to proteins at an amino acid called tyrosine. Phosphorylation regulates the function...Abl, which makes a highly overactive tyrosine kinase variant that is found in the cytoplasm...