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相关概念视频

Semiconductors01:22

Semiconductors

655
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
655

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相关实验视频

Updated: Jun 13, 2025

Author Spotlight: Advances in Evaluating Human Lung Epithelial Cells' Response to Metal-Organic Frameworks
04:53

Author Spotlight: Advances in Evaluating Human Lung Epithelial Cells' Response to Metal-Organic Frameworks

Published on: May 26, 2023

864

具有跨平台Hi-C元分析的地图功能绝缘体.

Wanying Xu, Jian Cui, Shanshan Zhang

    bioRxiv : the preprint server for biology
    |June 12, 2025
    PubMed
    概括
    此摘要是机器生成的。

    功能绝缘体 (FIN) 通过动态循环形成来识别,而不仅仅是静态边界. CTCF的耗尽揭示了新的,依赖于凝聚素的增强剂-促进剂循环,激活基因,将FIN定义为真正的转录绝缘体.

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    科学领域:

    • 基因组学就是基因组学.
    • 分子生物学分子生物学
    • 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.

    背景情况:

    • CTCF蛋白建立了拓关联域 (TAD) 边界.
    • 作为转录绝缘体的TAD边界的确切作用仍在争论中.

    研究的目的:

    • 在动态循环形成和基因调节的基础上重新定义功能绝缘体 (FIN).
    • 使用大规模数据集识别全基因组FIN及其目标基因.

    主要方法:

    • 对9个Hi-C和微C数据集的元分析.
    • 对CTCF和凝聚蛋白耗尽对基因组架构的影响的分析.
    • 鉴定增强剂-促进剂 (E-P) 循环和相关的基因表达变化.

    主要成果:

    • 在CTCF耗尽后新形成的E-P循环依赖于凝聚素,并与基因激活相关.
    • 在全基因组范围内绘制了FIN,主要在euchromatin中,并且与TAD边界不同.
    • FINs的功能对 Wapl 耗尽和 CTCF 位移很敏感.

    结论:

    • 以动态循环形成为特征的FINs充当真正的转录绝缘体.
    • TAD边界并不总是作为绝缘体起作用.
    • 动态基因组相互作用对于理解基因调节至关重要.