Insects synthesize pheomelanin.
نویسندگان
چکیده
1 Department of Evolutionary Ecology, Do~nana Biological Station—CSIC, Sevilla, Spain 2 National Museum of Natural Sciences—CSIC, Madrid, Spain 3 Department of Molecular Biology and Biochemical Engineering, Pablo de Olavide University, Sevilla, Spain 4 Department of Chemistry, Fujita Health University School of Health Sciences, Toyoake, Aichi, Japan Correspondence Ismael Galv!an, e-mail: [email protected]
منابع مشابه
Eumelanin and pheomelanin are predominant pigments in bumblebee (Apidae: Bombus) pubescence
BACKGROUND Bumblebees (Hymenoptera: Apidae: Bombus) are well known for their important inter- and intra-specific variation in hair (or pubescence) color patterns, but the chemical nature of the pigments associated with these patterns is not fully understood. For example, though melanization is believed to provide darker colors, it still unknown which types of melanin are responsible for each co...
متن کاملXI International Pigment Cell Conference
Pheomelanin is synthesized within melanocytes of hair follicles in mice of appropriate Agouti (a)or Extension (e)locus genic constitution. Alleles at the a-locus program pheomelanogenesis by altering the internal environment of hair follicles whereas alleles at the e locus do so by direct action through the genome of the melanocyte. For example, although transplanted recessive yellow (ele) mela...
متن کاملAge Determination of the Glassy-Winged Sharpshooter, Homalodisca vitripennis, using Wing Pigmentation
A red pigment is contained in the wing veins of the glassy-winged sharpshooter, Homalodisca vitripennis (Hemiptera: Cicadellidae). This insect is the main vector of the plant-pathogenic bacterium Xylella fastidiosa Wells (Xanthomonadales: Xanthomonadaceae), the causal agent of Pierce's disease of grapevines. Over the course of the H. vitripennis lifespan, the red pigment darkens and eventually ...
متن کاملThe ultraviolet absorption coefficient of melanosomes decreases with increasing pheomelanin content.
Uveal melanosomes from the iridal stroma contain both eumelanin and pheomelanin, the ratio of which varies with iris color. Herein, we report the absorption coefficient at lambda = 244 nm for individual human iridal stroma melanosomes from dark brown and blue-green irides. The melanosomes are nearly identical in size, but differ in the relative concentration composition, ranging from a eumelani...
متن کاملEumelanin and pheomelanin concentrations in human epidermis before and after UVB irradiation.
Pheomelanin is widely thought to be causally related to susceptibility to the harmful effects of ultraviolet radiation: epidemiological studies show that those with a higher ratio of pheomelanin to eumelanin in hair have higher rates of melanoma, and work in mouse and cell culture shows that pheomelanin generates excess free radicals after UVR exposure. By contrast, based on measurements of eum...
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ورودعنوان ژورنال:
- Pigment cell & melanoma research
دوره 28 5 شماره
صفحات -
تاریخ انتشار 2015