منابع مشابه
Pathogenic roles for fungal melanins.
Melanins represent virulence factors for several pathogenic fungi; the number of examples is growing. Thus, albino mutants of several genera (in one case, mutated precisely in the melanizing enzyme) exhibit decreased virulence in mice. We consider the phenomenon in relation to known chemical properties of melanin, beginning with biosynthesis from ortho-hydroquinone precursors which, when oxidiz...
متن کاملSemiconductor properties of melanins prepared from catecholamines.
D. C. dark - and photoconductivity measurements were performed with synthetic melanins prepared by oxidative polymerization of dopamine, adrenaline, adrenochrome and adrenolutin. The melanins examined show significant differences in conductivity, thermal activation energy and photocurrent intensity values. The differences in semiconductor properties observed between the melanins reflect the str...
متن کاملMicrobial melanins for radioprotection and bioremediation
Microbial melanins provide a biocompatible and scalable approach for bioremediation and radioprotection technologies due to their physicochemical properties.
متن کاملFungal Melanins Differ in Planar Stacking Distances
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. Current models of melanin structure envision the stacking of planar structures. X ray diffraction has historically been used to deduce stacking parameters. In this study w...
متن کاملMelanins and resistance of fungi to lysis.
Hyphal walls of Aspergillus phoenicis and Sclerotium rolfsii are composed of large amounts of glucose- and N-acetylhexosamine-containing polysaccharides, and the walls are extensively digested by streptomycete culture filtrates or by a mixture of purified chitinase and beta-(1 --> 3) glucanase preparations with the release of the monomeric units. A. phoenicis conidial walls also contain polymer...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1969
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(69)86370-8