Melanin

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چکیده

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منابع مشابه

Melanin, melanin "ghosts," and melanin composition in Cryptococcus neoformans.

Melanin synthesis is associated with virulence for the pathogenic fungus Cryptococcus neoformans. Exposure of nonmelanized C. neoformans 4067 cells to 4 M guanidinium isothiocyanate followed by 6 M HCl at 100 degrees C resulted in complete solubilization of cellular structures. However, exposure of melanized C. neoformans 24067 to the same conditions produced a suspension of black particles. An...

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Study of Melanin Bleaching After Immunohistochemistry of Melanin-containing Tissues

Melanin may interfere with immunohistochemical staining. The goal of this study was to investigate the effects of trichloroisocyanuric acid (TCCA) bleaching, potassium permanganate bleaching, and potassium dichromate bleaching on melanin, tissue antigen, and 3,3'-diaminobenzidine (DAB) using melanin-containing and melanin-free tissue samples. Our results demonstrated that all 3 bleaching method...

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Isolation, Characterization of Melanin Producing Organism and Extraction of Melanin

Melanin producing organism was isolated from a soil sample of Ahmednagar district, Maharashtra using Tyrosine casein media. The isolated organism’s morphology and spore arrangement was studied. The isolated organism was suspected to belong to the genus Streptomyces. Parameter optimization of the Tyrosine casein media with respect to carbon and nitrogen source was done. Starch and L-glycine were...

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Biochemistry of melanin formation.

ELANIN PIGMENTATION has aroused the curiosity and attention of man since the beginning of recorded history. This interest stems in part from the social, protective and cosmetic significance of pigmentation. In addition, much interest has arisen concerning the possible role of melanin formation in the development of the melanoma which has been described as having the most sinister reputation of ...

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Oxidation causes melanin fluorescence.

PURPOSE The goal of this study is the characterization of the strong yellow fluorescence of oxidized melanin in the retinal pigment epithelium (RPE) and the choroid. METHODS Naturally occurring melanin in the human retina and choroid was oxidized by exposing fixed and plastic-embedded sections of a human eye to light and hydrogen peroxide. Synthetic melanin was also oxidized in vitro by expos...

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ژورنال

عنوان ژورنال: Current Biology

سال: 2020

ISSN: 0960-9822

DOI: 10.1016/j.cub.2019.12.042