翻訳と辞書 Words near each other ・ POSITIF (project) ・ Positio ・ Position ・ Position (finance) ・ Position (music) ・ Position (obstetrics) ・ Position (poker) ・ Position (team sports) ・ Position (vector) ・ Position Among the Stars ・ Position analysis questionnaire ・ Position and momentum space ・ Position angle ・ Position circle ・ Position Correction ・ Position effect ・ Position error ・ Position fixing ・ Position Ignition ・ Position line ・ Position of Lebanon in the 2006 Lebanon War ・ Position of the arms in ballet ・ Position of the media on the Armenian Genocide ・ Position of the Sun ・ Position of trust ・ Position operator ・ Position paper ・ Position player ・ Position resection ・ Position sensitive device 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 Position effect ： ウィキペディア英語版 Position effect Position effect is the effect on the expression of a gene when its location in a chromosome is changed, often by translocation. This has been well described in ''Drosophila'' with respect to eye color and is known as position effect variegation (PEV). The phenotype is well characterised by unstable expression of a gene that results in the red eye coloration. In the mutant flies the eyes typically have a mottled appearance of white and red sectors. These phenotypes are often due to a chromosomal translocation such that the color gene is now close to a region of heterochromatin. The heterochromatin can spread stochastically and switch off the color gene resulting in the white eye sectors. ''Position effect'' is also used to describe the variation of expression exhibited by identical transgenes that insert into different regions of a genome. In this case the difference in expression is often due to enhancers that regulate neighboring genes. These local enhancers can also affect the expression pattern of the transgene. Since each transgenic organism has the transgene in a different location each transgenic organism has the potential for a unique expression pattern. ==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「Position effect」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.