Results 151 to 160 of about 2,749 (174)
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PHOTOLYSIS OF PHEOMELANIN PRECURSORS: AN ESR‐SPIN TRAPPING STUDY
Photochemistry and Photobiology, 1986AbstractThe photolysis of 5‐S‐cysteinyldopa, 2,5‐S,S‐dicysteinyldopa, 4‐hydroxybenzothiazole and cysteinyldopa melanins has been studied by ESR‐spin trapping methods using 5.5‐dimethyl‐1‐pyrroline‐1‐oxide and 2‐methyl‐2‐nitrosopropane as spin traps for hydrated electrons, hydrogen atoms, and carbon‐centered alanyl radicals.
B, Pilas +3 more
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Synthesis and analysis of pheomelanin degradation products. 2
The Journal of Organic Chemistry, 1984Synthese de 2 des produits de degradation par HI: hydroxy-4 benzothiazolyl-7alanine (A) et hydroxy-3 amino-4 phenylalanine (B). Analyse HPLC des produits de degradation: hydroxy-4 benzothiazolyl-6alanine et son derive methyl-2, amino-3 tyrosine, dihydro-3,4 hydroxy-5 oxo-3 benzothiazine-1,4yl-7alanine, acide amino-7 hydroxy-6 isoquinoleinecarboxylique ...
Dilip G. Patil, Miles R. Chedekel
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High prevalence of cataracts in birds with pheomelanin-based colouration
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2012The crystalline lens of the eyes of vertebrates focuses light on the retina. Therefore, maintaining the lens clear is necessary for proper visual function. However, oxidative damage to proteins of the lens leads to opacification and lens dysfunction, termed cataract.
Ismael, Galván +3 more
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Eumelanins and Pheomelanins: Characterization by Electron Spin Resonance Spectroscopy
Science, 1982Synthetic dopa melanin and cysteinyldopa melanin have different electron spin resonance spectra. Data are reported for mixtures of these melanins and for dopa-cysteinyldopa copolymers, which are spectroscopically similar. A simple parameterization of the spectra allows estimation of the relative amounts of (i) dopa melanin and cysteinyldopa melanin in ...
R C, Sealy +4 more
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Ultrathin and Smooth Pheomelanin-like Photoconductive Film
ACS Applied Materials & InterfacesThis study introduces a facile method for the substrate-independent deposition of pheomelanin-like films, revealing unique and promising electrical characteristics. The conventional darkening of a dopamine solution at a basic pH was significantly delayed by the addition of l-cysteine, resulting in a distinctive temporal pattern: an initial quiescent ...
Jeong Sun Lee +3 more
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Pheomelanin Effect on UVB Radiation-Induced Oxidation/Nitration of l-Tyrosine
International Journal of Molecular Sciences, 2022Alessia Baseggio Conrado +2 more
exaly
Biosynthetic and structural studies on pheomelanin
Journal of the American Chemical Society, 1982RoseMarie B. Deibel, Miles R. Chedekel
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Seeing red: pheomelanin synthesis uncovered
Pigment Cell & Melanoma Research, 2009openaire +2 more sources
Eumelanin and pheomelanin concentrations in human epidermis before and after UVB irradiation
Pigment Cell & Melanoma Research, 2005Shosuke Itô, Kazumasa Wakamatsu
exaly