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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 Clostridium bifermentans ： ウィキペディア英語版 Clostridium bifermentans ''Clostridium bifermentans'' (CLOBI) is an anaerobic, motile, gram-positive bacterium. ==Mosquitocidal Effect of Clostridium bifermentans subsp. malaysia== Most Clostridial species are used for industrial applications but some are known to cause illness in animals and human. Only C. bifermentans strain shows mosquitocidal effect but presents no toxicity against nontarget organisms. Clostridium bifermentans subsp. malaysia was a subspecies of clostridial species from a collection of the Institute or Medical Research Malaysia. It is the first known anaerobic bacterium possessing larvicidal activity. According to biochemical analysis of C. bifermentans subsp. malaysia culture, the mosquitocidal toxins were produced by Cry operon, which carries four genes (cry16Aa, cry17Aa, cbm17.1, cbm17.2). When the four genes were individually expressed, none of the four proteins encoded exhibited mosquitocidal activity, suggesting that the toxicity requires four proteins cooperating as a complex to take effect. A single promoter was found upstream of the four genes, indicating that those four genes were likely to be expressed simultaneously. The half-life of toxicity was about 1 day and the toxin was unstable under high temperature. Although C. bifermentans subsp. malaysia is shown to be more lethal to Anopheles mosquito larvae, the toxin produced by Cry operon has no mosquitocidal effect on Anopheles. Thus, the genes accountable for the toxicity towards Anopheles are different than those controlled by Cry operon. Rather, the toxins selectively target Aedes mosquitoes, causing a high mortality of this particular larva. 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「Clostridium bifermentans」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.