Ommochrome (English spelling)

Japanese: オモクロム(英語表記)ommochrome
Ommochrome (English spelling)
A general term for tryptophan-derived pigment compounds, such as xanthommatine, an insect eye pigment produced from L-tryptophan via kynurenine and 3-hydroxykynurenine. The name is derived from the ommatidium, the individual eyelets found in arthropod compound eyes, where ommatidium is most prominent. Ommatidia are the individual small eyes found in arthropod compound eyes, and ommochromes are contained in the photoreceptor units located on the posterior surface of the cornea. Xanthommatine is a phenoxazone derivative, and other known compounds include ommatin D (xanthommatin sulfate) and rhodomatin.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
L‐トリプトファンからキヌレニン,3‐ヒドロキシキヌレニンを経て生成する昆虫の眼色素キサントマチンxanthommatineに代表されるトリプトファン由来の色素化合物の総称。この名称は,最も顕著にこの物質が存在している個眼ommatidiumにちなんでいる。個眼は節足動物の複眼にある個々の小眼で,オモクロムはその角膜の後面にある光受容の単位に含まれている。キサントマチンはフェノキサゾン誘導体で,このほかにオマチンD(キサントマチンの硫酸塩)やロドマチンという化合物も知られる。

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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