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相关概念视频

Histone Variants at the Centromere02:30

Histone Variants at the Centromere

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Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
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Centrosome Duplication02:25

Centrosome Duplication

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The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
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Centrioles and Centrosomes01:13

Centrioles and Centrosomes

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Most animal cells comprise a pair of centrioles together called a centrosome. The cell duplicates its centrosome and contains two centrosomes side-by-side, which begin to move apart during the prophase. As the centrosomes migrate to two different sides of the cell, microtubules start extending from each centrosome toward the other end. The mitotic spindle is composed of the centrosomes and their emerging microtubules.
Near the end of the prophase, also called late prophase or...
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Synteny and Evolution02:31

Synteny and Evolution

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John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
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Multi-species Conserved Sequences02:51

Multi-species Conserved Sequences

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Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale  studies have provided new insights into the evolutionary relationship between organisms.
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Cohesins02:20

Cohesins

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Cohesin protein complexes are a molecular glue that holds two sister chromatids together. They play an important role both in mitosis and meiosis. In mitosis, all cohesin complexes present on the chromosomes are removed before the start of the anaphase stage.
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相关实验视频

Updated: Sep 17, 2025

Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins
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马匹中CENP-A和中心体的演变.

Eleonora Cappelletti1, Francesca M Piras2, Marialaura Biundo3

  • 1Department of Biology and Biotechnology "Lazzaro Spallanzani", University of Pavia, Pavia, Italy. eleonora.cappelletti@unipv.it.

Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology
|June 30, 2025
PubMed
概括
此摘要是机器生成的。

中心分子DNA迅速进化,但在马类动物中,独特的无卫星重复的中心分子揭示了CENP-A表和新型中心分子形成. 这提供了对哺乳动物中体生物学和物种化的洞察.

关键词:
这就是CENP-A.在CENP-BB中.中心的中心 (Centromere)属埃克华斯 (Equus) 是一个属性.型进化的演化.卫星DNA是卫星中的DNA.

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Mass Spectrometry Analysis to Identify Ubiquitylation of EYFP-tagged CENP-A EYFP-CENP-A
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Author Spotlight: Establishing CENP-E Knockout HeLa Cells – A Novel Approach to Study Kinesin-7 CENP-E Biology and its Inhibitors
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科学领域:

  • 遗传学 是一个遗传学.
  • 进化生物学 进化生物学
  • 分子生物学分子生物学

背景情况:

  • 中心DNA,通常是卫星重复,在物种之间迅速演变和变化.
  • 中心基组素变体CENP-A对于哺乳动物中心基质功能至关重要.
  • 马类动物 (马,驴,斑马) 拥有独特的中间体,缺乏卫星重复,为中间体生物学提供了一个模型.

研究的目的:

  • 研究马匹中体的分子组织,专注于CENP-A结合和进化.
  • 了解新中心形成的机制及其在马类型进化和物种化中的作用.
  • 探索中心体DNA的分歧及其对哺乳动物中心体多样性的影响.

主要方法:

  • 在马匹中对中心色素的分子分析.
  • 中心分子的比较分子和细胞遗传学分析.
  • 关于马类动物进化和最近人类端粒对端粒基因组组合的综述.

主要成果:

  • CENP-A结合域在马类个体之间是可变的,形成遗传的类.
  • 马类动物中CENP-B与中心核脱,在其他地方与卫星DNA结合.
  • 新中心体通过中心体重新定位和罗伯茨的融合产生的,驱动马匹的型进化.

结论:

  • 马类中位素为研究哺乳动物中位素组织和进化提供了一个独特的模型.
  • CENP-A结合点和新型新中心体形成机制的表样提供了对遗传和型多样性的洞察力.
  • 了解马匹中位素增强了我们对哺乳动物中位素生物学广泛而未被研究的多样性的知识.