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单词 phaeomelanin
释义

phaeomelanin

英汉-汉英词典
n. 棕黑素
词组 | 习惯用语
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  • melanoma n. [医]黑素瘤;胎记瘤
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phaeomelanin 棕黑素

网络短语:
Phaeomelanin 棕黑色素; 伪黑色素; 黑素; 脱黑色素;
英语例句库
  1. Eumelanin is responsible for the darker colours such as black, blue, chocolate brown and phaeomelanin causes the lighter yellow/red colours such as tan, red, yellow.
    真黑素决定了深色系,如黑、蓝、巧克力色;棕黑素则影响浅色的红黄系,如茶色、红色、黄色。

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中文百科

黑色素 Melanin

(重定向自Phaeomelanin)

黑色素是一种生物色素,是酪胺酸经过一连串化学反应所形成,动物、植物与原生生物都有这种色素。黑色素通常是以聚合的方式存在。在黑色素细胞中,酪氨酸经酪氨酸酶作用,羟化生成多巴,后者经氧化、脱羧等反应转变成吲哚醌,最后吲哚醌聚合为黑色素。先天性酪氨酸酶缺乏的病人,因为不能合成黑色素,患者皮肤毛发等发白,称为白化病。患者对阳光敏感,易患皮肤癌。

英语百科

Melanin 黑色素

(重定向自Phaeomelanin)
Melanin pigment (light refracting granular material—center of image) in a pigmented melanoma.
Albinism occurs when melanocytes produce little or no melanin. This albino girl is from Papua New Guinea.
Part of the structural formula of eumelanin.
Part of the structural formula of pheomelanin.

Melanin /ˈmɛlənɪn/ (Greek:μέλας - melas, "black, dark") is a broad term for a group of natural pigments found in most organisms (arachnids are one of the few groups in which it has not been detected). Melanin is produced by the oxidation of the amino acid tyrosine, followed by polymerization. The pigment is produced in a specialized group of cells known as melanocytes.

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更新时间:2025/6/23 23:20:11