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相关概念视频

Euchromatin01:01

Euchromatin

6.7K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
6.7K
Chromatin Immunoprecipitation- ChIP02:36

Chromatin Immunoprecipitation- ChIP

10.8K
Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
10.8K
Lampbrush Chromosomes01:51

Lampbrush Chromosomes

7.8K
In 1882, Flemming observed lampbrush chromosomes (LBC) in salamander eggs. Later in 1892, Rückert observed LBCs in shark egg cells and coined the term "lampbrush chromosomes" because they looked like brushes used to clean kerosene lamps.
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops...
7.8K
Heterochromatin02:38

Heterochromatin

9.0K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at...
9.0K

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相关实验视频

Updated: May 9, 2025

Mapping Mammalian 3D Genome Interactions with Micro-C-XL
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Mapping Mammalian 3D Genome Interactions with Micro-C-XL

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Chrombus-XMBD:一个图形卷积模型,从染色质特征预测3D基因组.

Yuanyuan Zeng1,2, Zhiyu You2, Jiayang Guo2

  • 1Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, Fujian 361102, China.

Briefings in bioinformatics
|May 2, 2025
PubMed
概括

ChrombusXMBD使用新的图形卷积模型预测了3D色素相互作用. 该工具通过准确地绘制全基因组的染色质接触,增强对基因调节的理解.

关键词:
这是一个新的预测预测.这是一个3D基因组.表观基因组特征表观基因组特征表观基因组特征图形自编码器的自编码器长距离的相互作用.模型的概括性模型的概括性.

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Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C
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Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C

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Genome-wide Snapshot of Chromatin Regulators and States in Xenopus Embryos by ChIP-Seq
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Genome-wide Snapshot of Chromatin Regulators and States in Xenopus Embryos by ChIP-Seq

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相关实验视频

Last Updated: May 9, 2025

Mapping Mammalian 3D Genome Interactions with Micro-C-XL
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Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C
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Genome-wide Snapshot of Chromatin Regulators and States in Xenopus Embryos by ChIP-Seq
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Genome-wide Snapshot of Chromatin Regulators and States in Xenopus Embryos by ChIP-Seq

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科学领域:

  • 基因组学就是基因组学.
  • 计算生物学 计算生物学
  • 分子生物学分子生物学

背景情况:

  • 染色体的三维 (3D) 构造对于调节基因转录至关重要.
  • 目前用于基因组3D结构确定的实验方法昂贵且特定于特定的环境.

研究的目的:

  • 开发一种计算模型,ChrombusXMBD,用于从可用的染色体特征中预测染色体相互作用.
  • 为分析染色质动态和基因表达的 cis 调节提供一个可通用的工具.

主要方法:

  • ChrombusXMBD使用具有多头注意力机制的动态边缘卷积.
  • 该模型将2D染色体特征编码为可学习的嵌入空间,以生成全基因组的3D接触地图.
  • 这种方法从一开始就预测了色素相互作用.

主要成果:

  • ChrombusXMBD准确地回顾了拓学领域,表达量化特征位置和促进者/增强剂相互作用.
  • 该模型在预测色素相互作用方面表现优越,从1-2 Mb提高了11.8%-48.7%的相关性.
  • ChrombusXMBD成功预测了远程相互作用 (>2 Mb) 并显示了人类和小鼠细胞系的概括性.

结论:

  • ChrombusXMBD提供了一种新的,可泛化的分析工具,用于研究染色质相互作用和基因 cis 调节.
  • 该模型的参数提供了对控制细胞体组织的生物机制的见解.
  • 这种计算方法克服了用于3D基因组结构分析的实验技术的局限性.