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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 Small nucleolar RNA SNORD18 ： ウィキペディア英語版 Small nucleolar RNA SNORD18 SNORD18 (also known as U18) is a non-coding RNA (ncRNA) molecule which functions in the modification of other small nuclear RNAs (snRNAs). This type of modifiying RNA is usually located in the nucleolus of the eukaryotic cell which is a major site of snRNA biogenesis. It is known as a small nucleolar RNA (snoRNA) and also often referred to as a guide RNA. U18 belongs to the C/D box class of snoRNAs which contain the conserved sequence motifs known as the C box (UGAUGA) and the D box (CUGA). Most of the members of the box C/D family function in directing site-specific 2'-O-methylation of substrate RNAs. In humans and ''Xenopus laevis'' there are three closely related copies of U18 (called U18A, U18B, U18C) which are encoded in introns of ribosomal protein L1. In yeast U18 is located in the introns of Elongation Factor 1 beta (EF1-beta). Related snoRNAs in ''Arabidopsis thaliana'' and rice ''Oryza sativa'' have been named R63 and Z106 respectively. Factors involved in the processing of the intronic snoRNA have recently been elucidated. ==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「Small nucleolar RNA SNORD18」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.