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相关概念视频

Gene Flow02:39

Gene Flow

34.6K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
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Reporter Genes02:11

Reporter Genes

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Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
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Position-effect Variegation02:32

Position-effect Variegation

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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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Protein Diffusion in the Membrane01:24

Protein Diffusion in the Membrane

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Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
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Combinatorial Gene Control02:33

Combinatorial Gene Control

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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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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: May 26, 2025

Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps
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Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps

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原因GeD:为空间基因表达生成混合因果关系和扩散.

Rabeya Tus Sadia, Md Atik Ahamed, Qiang Cheng

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    |February 24, 2025
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    概括
    此摘要是机器生成的。

    因果GeD通过建模基因因果关系来整合单细胞RNA测序 (scRNA-seq) 和空间转录组学 (ST) 数据. 这种新的方法显著提高了数据整合的准确性,以增强生物洞察力.

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    Transient Gene Expression in Tobacco using Gibson Assembly and the Gene Gun
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    Conditional Genetic Transsynaptic Tracing in the Embryonic Mouse Brain
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    相关实验视频

    Last Updated: May 26, 2025

    Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps
    11:52

    Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps

    Published on: February 9, 2017

    5.9K
    Transient Gene Expression in Tobacco using Gibson Assembly and the Gene Gun
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    Transient Gene Expression in Tobacco using Gibson Assembly and the Gene Gun

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    Conditional Genetic Transsynaptic Tracing in the Embryonic Mouse Brain
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    Conditional Genetic Transsynaptic Tracing in the Embryonic Mouse Brain

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    科学领域:

    • 基因组学就是基因组学.
    • 生物信息学是一种生物信息学.
    • 计算生物学 计算生物学

    背景情况:

    • 整合单细胞RNA测序 (scRNA-seq) 和空间转录组学 (ST) 数据对于理解其空间背景下的基因表达至关重要.
    • 目前的整合方法表现有限,通常无法捕捉复杂的基因相互作用,并且结构相似性低于60%.

    研究的目的:

    • 开发一个新的计算框架,CausalGeD,用于准确整合scRNA-seq和ST数据.
    • 利用基因之间的因果关系来提高空间转录基因数据集成的性能.

    主要方法:

    • 因果GeD结合了扩散和自回归过程,以建模基因因果关系.
    • 该模型将原来用于图像生成的因果注意力变压器概括为基因表达数据.
    • 这种方法捕捉了基因调节机制,而不需要预定义的关系.

    主要成果:

    • 与最先进的方法相比,CausalGeD在10个不同的组织数据集中表现出卓越的性能.
    • 关键指标,包括皮尔森的相关性和结构相似性,与CausalGeD.显示了5-32%的改善.
    • 该模型成功捕获了复杂的基因调节机制,推进了技术整合和生物解释.

    结论:

    • 因果GeD通过结合基因因果关系,在整合scRNA-seq和ST数据方面取得了重大进展.
    • 该方法为空间基因表达模式提供了更准确和生物学上更有意义的见解.
    • 这项工作为通过集成的欧米克数据更深入地了解组织架构和细胞功能铺平了道路.