A red pigmented protein found in the blood cells or plasma of earthworms, leeches, lugworms, sea cucumbers, ark shells, flat shells, and other invertebrates. A hemoprotein similar to hemoglobin, it binds one molecule of oxygen per iron atom and transports oxygen within the body. Depending on the animal species, it forms aggregates with molecular weights ranging from 170,000 to several million. X-ray structural analysis has shown that its three-dimensional structure is very similar to myoglobin. [Hoya Koichi] Source: Heibonsha World Encyclopedia, 2nd Edition Information |
ミミズ,ヒル,ゴカイ,ナマコ,アカガイ,ヒラマキガイ,その他の無脊椎動物の血球または血漿(けつしよう)中に存在する赤色色素タンパク質。ヘモグロビンと類似のヘムタンパク質で,鉄1原子当り1分子の酸素を結合し,生体内で酸素を運搬する。動物種によって分子量17万~数百万の会合体を形成する。X線構造解析によると,その立体構造はミオグロビンにきわめてよく似ている。【宝谷 紘一】
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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