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Regulation of Expression at Multiple Steps01:23

Regulation of Expression at Multiple Steps

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The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
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Regulation of Expression Occurs at Multiple Steps02:24

Regulation of Expression Occurs at Multiple Steps

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Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
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Regulation of Expression Occurs at Multiple Steps02:24

Regulation of Expression Occurs at Multiple Steps

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Structure of a Gene01:30

Structure of a Gene

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A gene is the fundamental unit of heredity. Every individual has two copies of each gene, one inherited from each parent. Although most people contain the same genes, there is a small fraction that is slightly different amongst people. A gene with a small difference in its sequence of DNA bases forms different alleles, contributing to different phenotypes.
However, only 1% of the DNA is composed of genes that encode proteins; the rest, 99% is non-coding DNA. This non-coding DNA performs...
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What is Gene Expression?01:36

What is Gene Expression?

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A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised  of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then...
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What is Gene Expression?01:42

What is Gene Expression?

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Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...
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Updated: Jan 15, 2026

Sealable Femtoliter Chamber Arrays for Cell-free Biology
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遺伝子発現ノイズの発達におけるゲノムワイドなダイナミクス

Danique J C Bax1, Jeske Strik1, Lynn A P Schepens1

  • 1Department of Molecular Biology, Faculty of Science, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University, Nijmegen 6525GA, The Netherlands.

Trends in genetics : TIG
|January 13, 2026
PubMed
まとめ

遺伝子発現ノイズは細胞のばらつきを引き起こし、哺乳類の発生における細胞運命に影響を与えます。新しい技術は、このノイズを定量化するのに役立ち、初期胚発生とRNAのばらつきに関する洞察を明らかにします。

キーワード:
バーストダイナミクス胎生発生遺伝子発現ノイズ単一細胞RNAシーケンシング

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Processing of Primary Brain Tumor Tissue for Stem Cell Assays and Flow Sorting
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Determining Genome-wide Transcript Decay Rates in Proliferating and Quiescent Human Fibroblasts
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Determining Genome-wide Transcript Decay Rates in Proliferating and Quiescent Human Fibroblasts

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科学分野:

  • 発生生物学
  • 遺伝学
  • 分子生物学

背景:

  • 均一な細胞集団でさえ、RNAおよびタンパク質レベルでの細胞間ばらつき、すなわち遺伝子発現ノイズが観察されます。
  • このばらつきは、哺乳類の発生における細胞運命の特定において、機能的重要性があることがますます認識されています。
  • 最近の技術的進歩により、転写産物ばらつきの正確な定量化と分析が容易になります。

研究 の 目的:

  • 初期の哺乳類胚発生における遺伝子発現ノイズの重要性に関する最近の発見をレビューすること。
  • 発生プロセスにおけるRNAのばらつきの役割に焦点を当てること。
  • 遺伝子発現ノイズの定量化と理解のための新しい方法論を議論すること。

主な方法:

  • 遺伝子発現ノイズと哺乳類の発生に関する最近の文献のレビュー。
  • ゲノムワイドおよび単一細胞技術を利用した研究に焦点を当てる。
  • ノイズ定量化のための新しいアプローチの議論。

主要な成果:

  • 遺伝子発現ノイズは、初期胚発生において重要な役割を果たします。
  • RNAのばらつきは、このノイズの重要な側面です。
  • 新しい方法は、ノイズ源を解明する能力を向上させています。

結論:

  • 遺伝子発現ノイズの理解は、初期の哺乳類発生を解読するために不可欠です。
  • 技術の進歩は、転写産物ばらつきの複雑さを解明するために重要です。
  • ノイズ源に関するさらなる研究は、発生プロセスについてのより深い洞察をもたらすでしょう。