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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 Bradytroph ： ウィキペディア英語版 Bradytroph A bradytroph is a strain of an organism that exhibits slow growth in the absence of an external source of a particular metabolite. This is usually due to a defect in an enzyme required in the metabolic pathway producing this chemical. Such defects are the result of mutations in the genes encoding these enzymes. As the organism can still produce small amounts of the chemical, the mutation is not lethal. In these bradytroph strains, rapid growth occurs when the chemical is present in the cell's growth media and the missing metabolite can be transported into the cell from the external environment. A bradytroph may also be referred to as a "leaky auxotroph". Examples of bradytrophic strains of microorganisms include mutants defective in thiamine production in ''Bacillus subtilis'', as well as strains of ''Saccharomyces cerevisiae'' with mutations that impair arginine biosynthesis. ==See also== * Autotroph * Auxotrophy 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「Bradytroph」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.