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Related Concept Videos

Chromosome Structure02:40

Chromosome Structure

A functional eukaryotic chromosome must contain three elements: a centromere, telomeres, and numerous origins of replication.
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
Chromosome Structure02:40

Chromosome Structure

A functional eukaryotic chromosome must contain three elements: a centromere, telomeres, and numerous origins of replication.
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
Forces Acting on Chromosomes02:11

Forces Acting on Chromosomes

During mitosis, chromosome movements occur through the interplay of multiple piconewton level forces. In prometaphase, these forces help in chromosome assembly or congression at the equatorial plane, eventually leading to their alignment at the metaphase plate. The forces acting on the chromosomes are space and time-dependent; therefore, they vary with the position of the chromosomes as the cell progresses through mitosis. 
Microtubules and motor proteins exert two types of forces on...
Forces Acting on Chromosomes02:11

Forces Acting on Chromosomes

During mitosis, chromosome movements occur through the interplay of multiple piconewton level forces. In prometaphase, these forces help in chromosome assembly or congression at the equatorial plane, eventually leading to their alignment at the metaphase plate. The forces acting on the chromosomes are space and time-dependent; therefore, they vary with the position of the chromosomes as the cell progresses through mitosis. 
Microtubules and motor proteins exert two types of forces on...
Interphase00:54

Interphase

The cell cycle occurs over approximately 24 hours (in a typical human cell) and in two distinct stages: interphase, which includes three phases of the cell cycle (G1, S, and G2), and mitosis (M). During interphase, which takes up about 95 percent of the duration of the eukaryotic cell cycle, cells grow and replicate their DNA in preparation for mitosis.
Interphase00:56

Interphase

The cell cycle occurs over approximately 24 hours (in a typical human cell) and in two distinct stages: interphase, which includes three phases of the cell cycle (G1, S, and G2), and mitosis (M). During interphase, which takes up about 95 percent of the duration of the eukaryotic cell cycle, cells grow and replicate their DNA in preparation for mitosis.
Phases of Interphase
Following each period of mitosis and cytokinesis, eukaryotic cells enter interphase, during which they grow and replicate...

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Related Experiment Video

Updated: Jul 2, 2026

Probing The Structure And Dynamics Of Nucleosomes Using Atomic Force Microscopy Imaging
09:52

Probing The Structure And Dynamics Of Nucleosomes Using Atomic Force Microscopy Imaging

Published on: January 31, 2019

Structure and dynamics of interphase chromosomes.

Angelo Rosa1, Ralf Everaers

  • 1Max-Planck-Institut für Physik Komplexer Systeme, Dresden, Germany. anrosa@unizar.es

Plos Computational Biology
|August 30, 2008
PubMed
Summary
This summary is machine-generated.

Computer simulations reveal that chromosome territories in eukaryotic cell nuclei arise from polymer physics, not nuclear scaffolds. This kinetic effect explains chromosome organization during interphase without complex interactions.

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Related Experiment Videos

Last Updated: Jul 2, 2026

Probing The Structure And Dynamics Of Nucleosomes Using Atomic Force Microscopy Imaging
09:52

Probing The Structure And Dynamics Of Nucleosomes Using Atomic Force Microscopy Imaging

Published on: January 31, 2019

Live Cell Imaging to Assess the Dynamics of Metaphase Timing and Cell Fate Following Mitotic Spindle Perturbations
07:14

Live Cell Imaging to Assess the Dynamics of Metaphase Timing and Cell Fate Following Mitotic Spindle Perturbations

Published on: September 20, 2019

Imaging Replicative Domains in Ultrastructurally Preserved Chromatin by Electron Tomography
14:56

Imaging Replicative Domains in Ultrastructurally Preserved Chromatin by Electron Tomography

Published on: May 20, 2022

Area of Science:

  • Cell Biology
  • Biophysics
  • Computational Biology

Background:

  • During interphase, chromosomes decondense but occupy distinct territories within eukaryotic nuclei.
  • Fluorescent in situ hybridization (FISH) experiments demonstrate this nuclear organization.

Purpose of the Study:

  • To investigate the physical mechanisms underlying the formation and stability of chromosome territories.
  • To determine if polymer physics alone can explain observed territory structures and dynamics.

Main Methods:

  • Utilized computer simulations of decondensing chromosomes.
  • Developed a parameter-free minimal model based on polymer dynamics.
  • Compared simulation results with experimental FISH data from human, Drosophila, and yeast chromosomes.

Main Results:

  • Demonstrated that chromosome territories are a kinetic effect explainable by polymer physics.
  • Showed that confined Brownian motion and topological constraints drive territory formation.
  • Successfully reproduced experimentally observed territory shapes and inter-site distances.

Conclusions:

  • Chromosome territories are a generic consequence of polymer effects, not requiring nuclear scaffolds or specific DNA interactions.
  • Interphase chromosome structure and dynamics are governed by fundamental principles of polymer physics.
  • Topological constraints play a crucial role in the segregation of decondensed chromosomes.