…Eukaryotic cells also have small circular DNA outside the nucleus in mitochondria and chloroplasts. In bacterial DNA, there are special base sequences called ISs (insertion sequences) and transposons flanked by two ISs, which jump around on DNA at low frequency and cause mutations such as insertions and deletions. Similar sequences also exist in eukaryotic cell DNA, and their role in evolution and regulation of gene expression is attracting attention. … *Some of the terminology explanations that mention "transposon" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…真核生物細胞には,核外にもミトコンドリアや葉緑体中に小さな環状DNAが存在する。また細菌のDNA中には,IS(insertion sequence,挿入断片)や二つのISで挟まれたトランスポゾンtransposonという特殊な塩基配列があって,これらは低頻度でDNAの上を飛び移り,挿入や欠失などの突然変異を起こしている。これに類似のものは真核細胞DNA中にも存在し,進化や遺伝子発現の調節に占める役割が注目されている。… ※「transposon」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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