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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...
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Regulation of Expression Occurs at Multiple Steps02:24

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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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Morphogenesis02:19

Morphogenesis

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Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
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Combinatorial Gene Control02:33

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Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
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Master Transcription Regulators02:23

Master Transcription Regulators

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Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
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A Microfluidics Approach for the Functional Investigation of Signaling Oscillations Governing Somitogenesis
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一个具有单一调节功能的形态遗传模型中的图灵模式.

Mohamed Amine Ouchdiri1, Saad Benjelloun2, Adnane Saoud1

  • 1UM6P, College of Computing, Benguerir, Morocco.

Mathematical biosciences
|September 19, 2025
PubMed
概括
此摘要是机器生成的。

合成生物学使得图灵测试成为可能.

关键词:
形态发生 形态发生 形态发生反应扩散系统的反应.由图灵扩散驱动的不稳定性微弱的非线性分析.

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Using Confocal Analysis of Xenopus laevis to Investigate Modulators of Wnt and Shh Morphogen Gradients
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科学领域:

  • 发展生物学 发展生物学
  • 合成生物学 合成生物学
  • 数学生物学 数学生物学

背景情况:

  • 确认艾伦·图灵在发育过程中的形态原体理论是复杂的.
  • 合成生物学提供了新的方法来验证图灵的预测.
  • 最近的合成哺乳动物模式形成利用了节点-左侧反应-扩散系统.

研究的目的:

  • 为了研究在合成的节点-左侧反应-扩散系统中图灵模式的出现.
  • 分析支持图灵不稳定性和模式形成的数学条件.

主要方法:

  • 线性稳定性分析以确定图灵不稳定性的条件.
  • 弱非线性分析和多个时间尺度来导出振幅方程.
  • 对超临界和亚临界分叉情况的分析.

主要成果:

  • 对于节点-左边系统的全局解决方案的存在已被证明.
  • 图灵不稳定性的条件得到了推导.
  • 该系统支持多样化的模式形成,亚临界的图灵不稳定性是实验消散结构的关键.

结论:

  • 合成的节点-左边系统有效地证明了图灵模式的形成.
  • 亚临界的图灵不稳定性对于产生观察到的散射结构至关重要.
  • 这项工作在合成生物背景下验证了图灵的理论.