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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.
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Mitosis and Cytokinesis01:35

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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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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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Phase Diagrams02:39

Phase Diagrams

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A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
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Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
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Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
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Electrophoretic Separation of Proteins
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Electrophoretic Separation of Proteins

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Protein phase separation in mitosis.

Ashish Kumar Tiwary1, Yixian Zheng1

  • 1Department of Embryology, Carnegie Institution for Science, Baltimore, MD 21218, United States.

Current Opinion in Cell Biology
|June 9, 2019
PubMed
Summary
This summary is machine-generated.

Protein phase separation drives the formation of liquid-like cellular condensates. These structures are crucial for the function of spindle apparatus and centrosomes, impacting cell division.

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Molecular Biology

Background:

  • Proteins can undergo phase separation, forming liquid-like condensates or droplets.
  • These condensates exhibit dynamic properties like flow and fusion.
  • Maturation can lead to gel or solid-like structures.
  • Liquid-like condensates are implicated as structural components of membrane-less organelles, such as stress granules.

Purpose of the Study:

  • To review and discuss the role of protein phase separation in the function of the spindle apparatus.
  • To explore the involvement of protein phase separation in centrosome biology.

Main Methods:

  • Literature review of recent studies.
  • Discussion of experimental evidence implicating protein phase separation.

Main Results:

  • Protein phase separation is a fundamental mechanism driving condensate formation.
  • These condensates play significant roles in the organization and function of the spindle apparatus.
  • Evidence suggests involvement in centrosome assembly and function.

Conclusions:

  • Protein phase separation is critical for cellular organization and function.
  • Understanding these processes offers insights into cell division and organelle biology.
  • Further research into phase separation mechanisms can illuminate fundamental biological processes.