a form of melanin found in human skin and hair, more common in people with dark skin
eumelanin in American English
(juːˈmelənɪn)
noun
Biochemistry
a pigment containing melanin, found in bird feathers
Word origin
[eu- + melanin]eu- is a combining form meaning “good,” “well,” occurring chiefly in words of Greek origin(eupepsia); in scientific coinages, esp. taxonomic names, it often has the sense “true, genuine”(eukaryote)
Examples of 'eumelanin' in a sentence
eumelanin
For the first time, two types of eumelanin were extracted by hydrochloric acid treatment.
Al Shimaa Gamal Shalaby, Tamer I.M. Ragab, Mohamed M.I. Helal, Mona A. Esawy 2019, 'Optimization of Bacillus licheniformis MAL tyrosinase: in vitro anticancer activityfor brown and black eumelanin', Heliyonhttp://www.sciencedirect.com/science/article/pii/S2405844018366908. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Three different traits representing the dilution of the phaeomelanin, eumelanin, and non-pigment-specific dilution were defined.
Wiener Pamela, Gutiérrez-Gil Beatriz, Williams John L 2007, 'Genetic effects on coat colour in cattle: dilution of eumelanin and phaeomelanin pigmentsin an F2-Backcross Charolais × Holstein population', BMC Geneticshttp://www.biomedcentral.com/1471-2156/8/56. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Oxidative polymerization of these two dihydroxyindoles eventually produces eumelanin pigments via melanochrome.
Manickam Sugumaran 2016, 'Reactivities of Quinone Methides versus o-Quinones in Catecholamine Metabolism andEumelanin Biosynthesis', International Journal of Molecular Scienceshttp://www.mdpi.com/1422-0067/17/9/1576. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
We speculate that eumelanin synthesis may require other unknown enzymes.
Baozhong Chai, Yunqian Qiao, He Wang, Xiaoming Zhang, Jiao Wang, Choushi Wang, PingZhou, Xiangdong Chen, Xiangdong Chen 2017, 'Identification of YfiH and the Catalase CatA As Polyphenol Oxidases of Aeromonas mediaand CatA as a Regulator of Pigmentation by Its Peroxyl Radical Scavenging Capacity',Frontiers in Microbiologyhttp://journal.frontiersin.org/article/10.3389/fmicb.2017.01939/full. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
It affects both eumelanin and pheomelanin containing melanosomes.
Julie Demars, Nathalie Iannuccelli, Valerio Joe Utzeri, Gerard Auvinet, JulietteRiquet, Luca Fontanesi, Daniel Allain 2018, 'New Insights into the Melanophilin (MLPH) Gene Affecting Coat Color Dilution in Rabbits',Geneshttp://www.mdpi.com/2073-4425/9/9/430. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
At the maximum capacity observed, the synthetic eumelanin coating bound ~9% of its mass in lead.
Karin Sono, Diane Lye, Christine A. Moore, W. Christopher Boyd, Thomas A. Gorlin,Jason M. Belitsky 2012, 'Melanin-Based Coatings as Lead-Binding Agents', Bioinorganic Chemistry and Applicationshttp://dx.doi.org/10.1155/2012/361803. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The eumelanin of the thorax and abdomen of infected individuals decreased significantly, as did the level of dopamine.
Shuqian Tan, Yang Wang, Pingping Liu, Yang Ge, Aomei Li, Yongjie Xing, David M. Hunter,Wangpeng Shi 2018, 'Increase of Albinistic Hosts Caused by Gut Parasites Promotes Self-Transmission',Frontiers in Microbiologyhttps://www.frontiersin.org/article/10.3389/fmicb.2018.01525/full. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Melanin denotes a variety of mammalian pigments, including the dark electrically conductive eumelanin and the reddish, sulfur-containing, pheomelanin.
Ludovico Migliaccio, Paola Manini, Davide Altamura, Cinzia Giannini, Paolo Tassini,Maria Grazia Maglione, Carla Minarini, Alessandro Pezzella 2019, 'Evidence of Unprecedented High Electronic Conductivity in Mammalian Pigment BasedEumelanin Thin Films After Thermal Annealing in Vacuum', Frontiers in Chemistryhttps://www.frontiersin.org/article/10.3389/fchem.2019.00162/full. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)