Hyeon Seo Park

3 weeks ago | mdpi.com | Hyeon Seo Park |Hee Jin Jung |Hye Soo Park |Hye Jin Kim

All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.

Jan 23, 2025 | mdpi.com | Hyeon Seo Park |Hee Jin Jung |Hye Soo Park |Hye Jin Kim

All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.

Jan 13, 2025 | mdpi.com | Hee Jin Jung |Hye Jin Kim |Hyeon Seo Park |Hye Soo Park

1. IntroductionMelanin is a polymeric pigment that provides organisms with color and is abundant in various living organisms ranging from bacteria to humans [1]. In humans, excluding neuromelanin, melanin is divided into two types: eumelanin, which has a 5,6-dihydroxyindole structure (black to brown), and pheomelanin, which has a benzothiazine or benzothiazole structure (red to yellow) [2,3,4]. These two melanins greatly influence the determination of skin color.

Oct 16, 2024 | mdpi.com | Hee Jin Jung |Hyeon Seo Park |Hye Jin Kim |Hye Soo Park

All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.

Sep 2, 2024 | mdpi.com | Hee Jin Jung |Hye Soo Park |Hye Jin Kim |Hyeon Seo Park

1. IntroductionMelanin is a pigment that varies in color from a red-yellow to black-brown pigment and is found in nearly all living organisms, including bacteria, plants, animals, and humans [1,2]. Melanin is an oligomer or polymer. Eumelanin has a 5,6-dihydroxyindole structure, whereas pheomelanin contains benzothiazine and benzothiazole structures [3]. Melanin determines the color of the skin, eyes, and hair [4] and plays a protective role by absorbing ultraviolet rays [5].