Results 31 to 40 of about 5,719 (219)

Photobleaching of pheomelanin increases its phototoxic potential: Physicochemical studies of synthetic pheomelanin subjected to aerobic photolysis

open access: yesPigment Cell & Melanoma Research, 2018
AbstractAlthough melanin is a photoprotective pigment, its elevated photochemical reactivity could lead to various phototoxic processes. Photoreactivity of synthetic pheomelanin, derived from 5‐S‐cysteinyldopa (5SCD‐M) and its photodegradation products obtained by subjecting the melanin to aerobic irradiation with UV‐visible light, was examined ...
Andrzej Zadlo   +9 more
openaire   +3 more sources

Probing pheomelanin synthesis using thioflavin T fluorescence [PDF]

open access: yesReporters, Markers, Dyes, Nanoparticles, and Molecular Probes for Biomedical Applications XI, 2019
The fluorescent rotor probe thioflavin T (ThT) is used to investigate the presence of sheet structures in pheomelanin by studying the formation and disassembly of pheomelanin synthesized from L-cysteine, L-DOPA and the enzyme tyrosinase. Brown/black eumelanin and red/yellow pheomelanin are the most common forms of melanin with the former more ...
Davy, Alastair Douglas, Birch, David
openaire   +2 more sources

Variação intraespecífica da cor da pelagem de uma espécie de pequeno roedor sul-americano [PDF]

open access: yes, 2016
Intra-specific color variation is often underestimated by researchers, and among mammalian species, intra-specific differences in coloration are poorly documented for most species.
Barquez, Ruben Marcos   +3 more
core   +2 more sources

Microarray-based analysis of the differential expression of melanin synthesis genes in dark and light-muzzle Korean cattle. [PDF]

open access: yesPLoS ONE, 2014
The coat color of mammals is determined by the melanogenesis pathway, which is responsible for maintaining the balance between black-brown eumelanin and yellow-reddish pheomelanin. It is also believed that the color of the bovine muzzle is regulated in a
Sang Hwan Kim   +2 more
doaj   +1 more source

Probing Near-Infrared Photorelaxation Pathways in Eumelanins and Pheomelanins [PDF]

open access: yesThe Journal of Physical Chemistry A, 2010
Ultraviolet-visible spectroscopy readily discerns the two types of melanin pigments (eumelanin and pheomelanin), although fundamental details regarding the optical properties and pigment heterogeneity are more difficult to disentangle via analysis of the broad featureless absorption spectrum alone.
Piletic, Ivan R   +2 more
openaire   +2 more sources

Sex-specific phenotypic integration: Endocrine profiles, coloration, and behavior in fledgling boobies [PDF]

open access: yes, 2015
The intensity of color expression in animals plays a key role in social environments as a mechanism to signal individual capacities in competitive contests. Selective pressures for resource competition differ at different stages of life and between sexes;
Fargallo, Juan A.   +6 more
core   +1 more source

Melanoma, Melanin, and Melanogenesis: The Yin and Yang Relationship

open access: yesFrontiers in Oncology, 2022
Melanin pigment plays a critical role in the protection against the harmful effects of ultraviolet radiation and other environmental stressors. It is produced by the enzymatic transformation of L-tyrosine to dopaquinone and subsequent chemical and ...
Radomir M. Slominski   +6 more
doaj   +1 more source

Skin Lightening Treatments: A Review on the Effect of Intravenous Glutathione in the Disease States of Women [PDF]

open access: yes, 2020
The skin bleaching industry is a global business with a vast array of anti-melanogenic choices including glutathione. Glutathione is synthesized in vivo but has been used as a bodily supplement by medical personnel to aid in preventative medicine.
Mthombeni, Buhle
core   +1 more source

Melanin-based coloration in juvenile kestrels (Falco tinnunculus) covaries with anti-predatory personality traits [PDF]

open access: yes, 2012
Recent studies have shown that melanin-based coloration is associated with the ability to cope with stressful environments, potentially explaining why coloration covaries with anti-predator behaviours, boldness and docility.
Henry, I.   +3 more
core   +1 more source

Sequence characterization and polymorphism of melanocortin 1 receptor gene in some goat breeds with different coat color of Mongolia [PDF]

open access: yesAsian-Australasian Journal of Animal Sciences, 2019
Objective Extension and Agouti loci play a key role for proportions of eumelanin and pheomelanin in determining coat color in several species, including goat. Mongolian goats exhibit diverse types of coat color phenotypes. In this study, investigation of
Onolragchaa Ganbold   +6 more
doaj   +1 more source

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