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Related Concept Videos

Euchromatin01:01

Euchromatin

7.5K
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...
7.5K
Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

6.6K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.6K
Heterochromatin02:38

Heterochromatin

14.6K
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...
14.6K
Duplication of Chromatin Structure02:05

Duplication of Chromatin Structure

6.0K
The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be accurately inherited, reassembled, and maintained in the daughter cells to ensure lineage propagation.
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
6.0K
Polytene Chromosomes02:04

Polytene Chromosomes

10.2K
Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also...
10.2K
Chromatin Position Affects Gene Expression02:35

Chromatin Position Affects Gene Expression

23.7K
Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
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Related Experiment Video

Updated: Sep 14, 2025

Chromatin Spread Preparations for the Analysis of Mouse Oocyte Progression from Prophase to Metaphase II
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Chromatin Spread Preparations for the Analysis of Mouse Oocyte Progression from Prophase to Metaphase II

Published on: February 26, 2018

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Germ cell chromatin†.

Stylianos Bakoulis1, Kathleen R Stewart-Morgan1

  • 1Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark.

Biology of Reproduction
|July 24, 2025
PubMed
Summary
This summary is machine-generated.

Mammalian germ cell development involves significant chromatin changes. New epigenetic profiling and in vitro gametogenesis methods allow deeper study of primordial germ cell (PGC) chromatin dynamics in mice and humans.

Keywords:
DNA methylationchromatinepigeneticshistone modificationsin vitro gametogenesisprimordial germ cellsreprogramming

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Chromatin Immunoprecipitation from Human Embryonic Stem Cells

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Generation of Human Primordial Germ Cell-like Cells at the Surface of Embryoid Bodies from Primed-pluripotency Induced Pluripotent Stem Cells
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Generation of Human Primordial Germ Cell-like Cells at the Surface of Embryoid Bodies from Primed-pluripotency Induced Pluripotent Stem Cells

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Related Experiment Videos

Last Updated: Sep 14, 2025

Chromatin Spread Preparations for the Analysis of Mouse Oocyte Progression from Prophase to Metaphase II
10:39

Chromatin Spread Preparations for the Analysis of Mouse Oocyte Progression from Prophase to Metaphase II

Published on: February 26, 2018

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Chromatin Immunoprecipitation from Human Embryonic Stem Cells
10:36

Chromatin Immunoprecipitation from Human Embryonic Stem Cells

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Generation of Human Primordial Germ Cell-like Cells at the Surface of Embryoid Bodies from Primed-pluripotency Induced Pluripotent Stem Cells
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Generation of Human Primordial Germ Cell-like Cells at the Surface of Embryoid Bodies from Primed-pluripotency Induced Pluripotent Stem Cells

Published on: January 11, 2019

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Area of Science:

  • Reproductive Biology
  • Epigenetics
  • Developmental Biology

Background:

  • Mammalian gametogenesis features a highly dynamic chromatin landscape.
  • Primordial germ cells (PGCs) undergo extensive epigenetic reprogramming during development.
  • Previous studies relied on descriptive analysis and mouse functional studies.

Purpose of the Study:

  • To review recent findings on germ cell chromatin dynamics.
  • To contextualize these findings within broader chromatin dynamics in mouse and human PGCs.
  • To highlight advances in epigenetic profiling and in vitro gametogenesis.

Main Methods:

  • Review of existing literature on PGC epigenetics.
  • Analysis of studies utilizing advanced epigenetic profiling techniques.
  • Consideration of research employing in vitro gametogenesis models.

Main Results:

  • Advances in epigenetic profiling offer unprecedented resolution of germ cell chromatin.
  • In vitro gametogenesis models provide new avenues for studying PGC development.
  • Comparative analysis reveals conserved and divergent chromatin dynamics in mouse and human PGCs.

Conclusions:

  • Epigenetic profiling and in vitro gametogenesis are revolutionizing germ cell research.
  • Understanding PGC chromatin dynamics is crucial for reproductive health.
  • Further research is needed to fully elucidate the mechanisms of epigenetic reprogramming in germ cells.