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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Orange carotenoid protein ： ウィキペディア英語版 Orange carotenoid protein Orange carotenoid protein (OCP) is a water-soluble protein which plays a role in photoprotection in diverse cyanobacteria.〔 It is the only photoactive protein known to use a carotenoid as the photoresponsive chromophore. The protein consists of two domains, with a single keto-carotenoid molecule non-covalently bound between the two domains. It is a very efficient quencher of excitation energy absorbed by the primary light-harvesting antenna complexes of cyanobacteria, the phycobilisomes. The quenching is induced by blue-green light. It is also capable of preventing oxidative damage by directly scavenging singlet oxygen (1O2). == History == OCP was first described in 1981 by Holt and Krogmann who isolated it from the unicellular cyanobacterium ''Arthrospira maxima'',〔 although its function would remain obscure until 2006. The crystal structure of the OCP was reported in 2003 and the protein was shown to be an effective quencher of singlet oxygen.〔 In 2000, it was demonstrated that cyanobacteria could perform photoprotective fluorescence quenching independent of lipid phase transitions, differential transmembrane pH, and inhibitors.〔 The action spectrum for this quenching process suggested the involvement of carotenoids,〔 and the specific involvement of the OCP was later demonstrated by Kirilovsky and coworkers in 2006.〔 In 2008, OCP was shown to require photoactivation by strong blue-green light for its photoprotective quenching function.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Orange carotenoid protein」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.