Melanosome

Japanese: melanosome
Melanosome

…Depending on the type of pigment granules in the cytoplasm, pigment phores are classified as melanophores, erythrophores, xanthophores, leucophores, etc. In the case of melanophores, when black pigment granules containing melanin, called melanosomes, are concentrated in the center of the cell, the body color becomes whitish. On the other hand, when melanosomes diffuse into the dendrites, the body color becomes blackish. …

From [Melanin]

…Melanin is soluble in alkali and warm concentrated sulfuric acid, but not in water. Melanin is produced in melanosomes, specialized structures formed in the cytoplasm of melanophores (often called melanocytes in warm-blooded animals and melanophores in cold-blooded animals) that are differentiated from melanoblasts. This process has been studied in detail. …

*Some of the terminology that mentions "melanosome" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…細胞質内の色素顆粒(かりゆう)の種類により黒色素胞,赤色素胞,黄色素胞,白色素胞などに分類される。これらのうち黒色素胞の場合には,メラニン色素を含むメラノソームmelanosomeと呼ばれる黒色素顆粒が細胞の中心部にいっせいに凝集すると体色は白っぽくなる。一方,メラノソームが樹枝状突起の中へ拡散すると黒っぽくなる。…

【メラニン】より

…メラニンはアルカリや温濃硫酸には溶けるが,水には溶けない。メラニンの生成は黒色素芽細胞が分化した黒色素胞(定温動物ではメラノサイトmelanocyte,変温動物ではメラノフォアmelanophoreと呼ばれることが多い)の細胞質内に形成される特殊な構造であるメラノソームmelanosome中で行われる。この過程は詳しく研究されている。…

※「melanosome」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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