ortho-Tyrosine (o-Tyrosine), an isomer of standard p-tyrosine, is a phenylalanine oxidation product used as an amino acid oxidation stress marker in analytical procedures such as HPLC and LC-ESI-MS/MS.
Journal of breath research, 4(1), 017104-017104 (2010-01-07)
The sensitive assay method was developed for a parallel, rapid and precise determination of the most prominent oxidative stress biomarkers: 8-iso-prostaglandin F(2α) a lipid oxidation biomarker, o-tyrosine an amino acid oxidation biomarker and 8-hydroxy-2'-deoxy-guanosine a nucleic acid oxidation biomarker. The
Biochemical and biophysical research communications, 312(2), 316-322 (2003-11-26)
An HPLC assay method and an LC-MS method were used to study the Udenfriend reaction and its variations by using phenylalanine as the hydroxylation substrate. The results indicate that (1). citric acid can replace EDTA as the promoter for the
The Journal of biological chemistry, 274(49), 34621-34628 (1999-11-27)
Oxidative stress is implicated in the death of dopaminergic neurons in Parkinson's disease and in the 1-methyl-4-phenyl-1,2,3, 6-tetrahydropyridine (MPTP) model of Parkinson's disease. Oxidative species that might mediate this damage include hydroxyl radical, tyrosyl radical, or reactive nitrogen species such
The Journal of pediatrics, 137(3), 421-424 (2000-09-02)
To test the hypothesis that kwashiorkor is associated with increased oxidative stress, urinary concentrations of 2 oxidized amino acids, o,o '-dityrosine and ortho -tyrosine, were measured by gas chromatography-mass spectrometry. Children with kwashiorkor, with or without infection, had a 3-
Measurement of o- and m-tyrosine as markers of oxidative damage in motor neuron disease.
Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.
