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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 Lactis-leu-phe leader RNA motif ： ウィキペディア英語版 Lactis-leu-phe leader RNA motif The leu/phe-leader RNA motif (also the ''lactis''-leu/phe-leader motif) is a conserved RNA structure identified by bioinformatics. These RNAs function as peptide leaders. They contain a short open reading frame (ORF) that contains many codons for leucine or phenylalanine. Normally, expression of the downstream genes is suppressed. However, when cellular concentrations of the relevant amino acid is low, ribosome stalling leads to an alternate structure that enables downstream gene expression. Leu/phe leaders of this structure are known only in the species ''Lactococcus lactis'', and is essentially the same as a previously characterized leucine leader in the same species. Additional homologs were uncovered that contain phenylalanine codons instead of leucine codons, and are upstream of genes involved in the synthesis of phenylalanine, instead of leucine. ==References== 〔 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「Lactis-leu-phe leader RNA motif」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.