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Related Concept Videos

Mitosis and Cytokinesis02:03

Mitosis and Cytokinesis

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In eukaryotes, the cell division cycle is divided into distinct, coordinated cellular processes that include cell growth, DNA replication/chromosome duplication, chromosome distribution to daughter cells, and finally, cell division. The cell cycle is tightly regulated by its regulatory systems as well as extracellular signals that affect cell proliferation.
The processes of the cell cycle occur over approximately 24 hours (in typical human cells) and in two major distinguishable stages. The...
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Mitosis and Cytokinesis01:35

Mitosis and Cytokinesis

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In eukaryotes, the cell division cycle is divided into distinct, coordinated cellular processes that include cell growth, DNA replication/chromosome duplication, chromosome distribution to daughter cells, and finally, cell division. The cell cycle is tightly regulated by its regulatory systems as well as extracellular signals that affect cell proliferation.
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Meiosis vs. Mitosis02:57

Meiosis vs. Mitosis

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Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
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Separation of Sister Chromatids02:17

Separation of Sister Chromatids

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At the transition from prophase to metaphase, there is a reduction in cohesion along the chromosomal arms, resulting in the resolution of sister chromatids. However, residual cohesin connections remain to hold the sister chromatids together until the transition from metaphase to anaphase. The residual connection prevents any premature separation of sister chromatids, blocking the risks of aneuploidy within the daughter cells.
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Meiosis I01:49

Meiosis I

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Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by...
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Meiosis I03:09

Meiosis I

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Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
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Related Experiment Video

Updated: Nov 3, 2025

A Cell Free Assay to Study Chromatin Decondensation at the End of Mitosis
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A Cell Free Assay to Study Chromatin Decondensation at the End of Mitosis

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Elucidating Human Mitosis Using an Anaphase-Like Cell-Free System.

Danit Wasserman1, Sapir Nachum1, Meirav Noach-Hirsh1

  • 1Faculty of Life Sciences and Institute of Nanotechnology and Advanced Materials, Bar-llan University, Ramat-Gan, Israel.

Methods in Molecular Biology (Clifton, N.J.)
|June 4, 2021
PubMed
Summary

Researchers developed a new human cell-free system to study mitosis. This system aids in understanding cell division regulation by cyclin-dependent kinase 1 (CDK1) and anaphase-promoting complex/cyclosome (APC/C).

Keywords:
APC/CAnaphaseCdc20Cdh1Cdk1Cell extractsCell-free systemMitosisNondegradable cyclin BUbiquitin-mediated degradation

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Live Cell Imaging of Chromosome Segregation During Mitosis
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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Mitosis and cell division rely on precise protein phosphorylation and degradation.
  • Cyclin-dependent kinase 1 (CDK1) and anaphase-promoting complex/cyclosome (APC/C) are key regulators of mitotic progression.
  • Studying these essential enzymes faces challenges in vitro and in vivo.

Purpose of the Study:

  • To develop a novel human cell-free system for studying mitotic regulation.
  • To provide a tool for direct and quantitative analysis of phosphorylation and APC/C-mediated proteolysis.
  • To complement existing cell-free systems and overcome limitations of traditional methods.

Main Methods:

  • Preparation of a new human cell-free system.
  • Recreating an anaphase-like state in vitro.
  • Utilizing the system for quantitative studies of mitotic signaling.

Main Results:

  • Successfully developed a human cell-free system that recapitulates an anaphase-like state.
  • The system allows for direct and quantitative investigation of mitotic regulators.
  • This toolkit enhances the study of phosphorylation and APC/C-mediated proteolysis.

Conclusions:

  • The new human cell-free system offers a valuable platform for mitotic research.
  • It overcomes limitations of traditional in vitro and in vivo studies.
  • Facilitates deeper understanding of genome stability and cell proliferation.