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相关概念视频

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...
1.3K
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...
25.7K
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...
15.4K
What is Gene Expression?01:36

What is Gene Expression?

10.9K
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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相关实验视频

Updated: Jan 15, 2026

Sealable Femtoliter Chamber Arrays for Cell-free Biology
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发育中的基因表达噪声:全基因组动态

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
概括

基因表达噪声导致细胞变异,影响哺乳动物发育过程中的细胞命运. 新技术有助于量化这种噪音,揭示了对早期胚胎发生和RNA变异性的洞察力.

关键词:
爆发动力学 爆发动力学胚胎发育过程中的胚胎.基因表达噪声是什么一个单细胞RNA测序.

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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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相关实验视频

Last Updated: Jan 15, 2026

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13:44

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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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科学领域:

  • 发展生物学 发展生物学
  • 遗传学 是一个遗传学.
  • 分子生物学分子生物学

背景情况:

  • 细胞对细胞RNA和蛋白质水平的变化,称为基因表达噪声,即使在同质的细胞群中也能观察到.
  • 这种变异性越来越多地被认为是其在哺乳动物发育过程中对细胞命运规范的功能重要性.
  • 最近的技术进步促进了对转录组变异性的精确量化和分析.

研究的目的:

  • 审查最近关于基因表达噪声在早期哺乳动物胚胎发生中的意义的发现.
  • 专注于RNA变异性在发育过程中的作用.
  • 讨论用于量化和理解基因表达噪声源的新方法.

主要方法:

  • 关于基因表达噪声和哺乳动物发育的最新文献的综述.
  • 专注于利用全基因组和单细胞技术的研究.
  • 讨论噪声量化新兴方法.

主要成果:

  • 基因表达噪声在早期胚胎发生过程中起着至关重要的作用.
  • RNA变异性是这种噪音的一个关键方面.
  • 新的方法正在提高解剖噪音源的能力.

结论:

  • 了解基因表达噪声对于破译早期哺乳动物发育至关重要.
  • 技术的进步对于揭示转录组变异性的复杂性至关重要.
  • 对噪声源的进一步研究将使人们对发育过程有更深入的了解.