Results 11 to 20 of about 21,003 (323)
Current Biology, 2020 Melanins are a unique class of pigments found throughout the biosphere with a wide variety of functions, structures, and presentations. Cordero and Casadevall highlight the wide range of places melanins are found and the diverse functions they play in nature.
Radames J B, Cordero, Arturo, Casadevall
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Characterization of Fungal Melanins from Black Stains on Paper Artefacts
Heritage, 2022 Melanins play a fundamental role in the biology and ecology of several fungal species. Unfortunately, this group of amorphous macromolecules also severely (and most times irreversibly) stains cultural heritage objects. Despite efforts made throughout the
Daniela Melo +4 more
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Physico-chemical evaluation of rationally designed melanins as novel nature-inspired radioprotectors. [PDF]
PLoS ONE, 2009 Melanin, a high-molecular weight pigment that is ubiquitous in nature, protects melanized microorganisms against high doses of ionizing radiation. However, the physics of melanin interaction with ionizing radiation is unknown.We rationally designed ...
Andrew D Schweitzer +9 more
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Melanin, melanin "ghosts," and melanin composition in Cryptococcus neoformans [PDF]
Infection and Immunity, 1996 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.
A Casadevall, Yulin Wang, Philip Aisen
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Fungal melanins differ in planar stacking distances. [PDF]
PLoS ONE, 2012 Melanins are notoriously difficult to study because they are amorphous, insoluble and often associated with other biological materials. Consequently, there is a dearth of structural techniques to study this enigmatic pigment.
Arturo Casadevall +3 more
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Molecules, 2022 We report herein an optimized procedure for preparation of carboxamides of 5,6-dihydroxyindole-2-carboxylic acid (DHICA), the main biosynthetic precursor of the skin photoprotective agents melanins, to get access to pigments with more favorable ...
Rita Argenziano +3 more
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Журнал микробиологии, эпидемиологии и иммунобиологии, 2023 Introduction. Influenza A virus is the cause of epidemics and pandemics that severely affect the health and socioeconomic status of the world's population.
Ekaterina I. Filippova +5 more
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Nature, 1947 IT has been suggested recently1 that 5 : 6: 5â:6â-tetrahydroxy-indigo (I), or a quinone or semi-quinone derived from it, is an important constituent of melanin, the black pigment produced by the oxidation of tyrosine and 3 : 4-dihydroxyphenylalanine2.
J, HARLEY-MASON, G R, CLEMO, J, WEISS
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Antioxidants, 2020 Eumelanins, the dark variant of skin pigments, are endowed with a remarkable antioxidant activity and well-recognized photoprotective properties that have been ascribed to pigment components derived from the biosynthetic precursor 5,6-dihydroxyindole-2 ...
Davide Liberti +4 more
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Melanisation in Boreal Lichens Is Accompanied by Variable Changes in Non-Photochemical Quenching
Plants, 2022 Lichens often grow in microhabitats where they absorb more light than they can use for fixing carbon, and this excess energy can cause the formation of harmful reactive oxygen species (ROS).
Nqobile Truelove Ndhlovu +3 more
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