翻訳と辞書 Words near each other ・ Pair distribution function ・ Pair gain ・ Pair Of Dice Paradise ・ Pair of Kings ・ Pair of pants (mathematics) ・ Pair of spaces ・ Pair potential ・ Pair production ・ Pair programming ・ Pair skating ・ Pair testing ・ Pair trawling ・ Pair-conversion ・ Pair-et-Grandrupt ・ Pair-instability supernova ・ Pair-rule gene ・ Paira ・ Pairagachha ・ Pairan ・ Pairat Decharin ・ Pairatahi River ・ Pairc nan Laoch ・ Paired data ・ Paired difference test ・ Paired disparity code ・ Paired home ・ Paired metamorphic belts ・ Paired opposites ・ Paired-end tag ・ Pairi Daiza Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Pair-rule gene ： ウィキペディア英語版 Pair-rule gene A pair-rule gene is a type of gene involved in the development of the segmented embryos of insects. Pair-rule genes are expressed as a result of differing concentrations of gap gene proteins, which encode transcription factors controlling pair-rule gene expression.〔(【引用サイトリンク】url=http://study.com/academy/lesson/segmentation-genes-in-drosophila-development-pair-rule-segment-polarity-gap-genes.html )〕 Pair-rule genes are defined by the effect of a mutation in that gene, which causes the loss of the normal developmental pattern in alternating segments. Pair-rule genes were first described by Christiane Nüsslein-Volhard and Eric Wieschaus in 1980. They used a genetic screen to identify genes required for embryonic development in the fruit fly ''Drosophila melanogaster''. In normal unmutated ''Drosophila,'' each segment produces bristles called denticles in a band arranged on the side of the segment closer to the head (the anterior). They found five genes – ''even-skipped, hairy, odd-skipped, paired'' and ''runt'' – where mutations caused the deletion of a particular region of every alternate segment. For example, in ''even-skipped,'' the denticle bands of alternate segments are missing, which results in an embryo having half the number of denticle bands. Later work identified more pair-rule genes in the ''Drosophila'' early embryo – ''fushi tarazu, odd-paired and sloppy paired''. Once the pair-rule genes had been identified at the molecular level it was found that each gene is expressed in alternate ''parasegments'' – regions in the embryo that are closely related to segments, but are slightly out of register. Each parasegment includes the posterior part of one (future) segment, and an anterior part of the next (more posterior) segment. The bands of expression of the pair-rule genes correspond to the regions missing in the mutant. The expression of the pair-rule genes in bands is dependent both upon direct regulation by the gap genes and on regulatory interactions between the pair-rule genes themselves. ==See also== ''Drosophila'' embryogenesis 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「Pair-rule gene」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.