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Updated: Sep 20, 2025

Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers
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Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers

Published on: September 20, 2018

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火社会染色体对基因组调节产生重大影响

Beryl M Jones1, Alex H Waugh2, Michael A Catto3

  • 1Department of Entomology, University of Kentucky, Lexington, KY 40508, USA.

Molecular biology and evolution
|May 24, 2025
PubMed
概括

超基因,连接基因的集合,影响复杂的特征. 在火中,超基因通过改变基因调节,染色质可访问性和转录,特别是可转移元素来影响社会结构.

关键词:
表观遗传学是指表观遗传学.进化 演化 演化 演化 演化 演化 演化 演化基因调节 基因调节 基因调节超级基因是一种超级基因.属性多态性特征的多态性特征

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相关概念视频

Chromatin Position Affects Gene Expression02:35

Chromatin Position Affects Gene Expression

Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
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In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
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The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
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