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Related Concept Videos

Chromatin Immunoprecipitation- ChIP02:36

Chromatin Immunoprecipitation- ChIP

Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
Duplication of Chromatin Structure02:05

Duplication of Chromatin Structure

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...
Heterochromatin02:38

Heterochromatin

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 9th...
Euchromatin01:01

Euchromatin

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...
Chromatin Packaging02:21

Chromatin Packaging

Each human somatic cell contains 6 billion base-pairs of DNA. Each base-pair is 0.34 nm long, which means that each diploid cell contains a staggering 2 meters of DNA. How is such a long DNA strand packed inside a nucleus measuring only 10 - 20 microns in diameter? 
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order structures.
Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

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 DNA...

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Related Experiment Video

Updated: May 21, 2026

Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C
09:32

Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C

Published on: October 14, 2022

Methods for identifying higher-order chromatin structure.

Samin A Sajan1, R David Hawkins

  • 1Department of Medicine, Division of Human Genetics, University of Washington, Seattle, WA 98195, USA.

Annual Review of Genomics and Human Genetics
|June 19, 2012
PubMed
Summary
This summary is machine-generated.

Chromatin packaging, the hierarchical organization of DNA and proteins within the nucleus, is crucial for cellular function. Advanced sequencing and conformation capture methods reveal higher-order structures like genomic loops.

More Related Videos

The ChroP Approach Combines ChIP and Mass Spectrometry to Dissect Locus-specific Proteomic Landscapes of Chromatin
24:02

The ChroP Approach Combines ChIP and Mass Spectrometry to Dissect Locus-specific Proteomic Landscapes of Chromatin

Published on: April 11, 2014

Capturing Chromosome Conformation Across Length Scales
10:15

Capturing Chromosome Conformation Across Length Scales

Published on: January 20, 2023

Related Experiment Videos

Last Updated: May 21, 2026

Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C
09:32

Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C

Published on: October 14, 2022

The ChroP Approach Combines ChIP and Mass Spectrometry to Dissect Locus-specific Proteomic Landscapes of Chromatin
24:02

The ChroP Approach Combines ChIP and Mass Spectrometry to Dissect Locus-specific Proteomic Landscapes of Chromatin

Published on: April 11, 2014

Capturing Chromosome Conformation Across Length Scales
10:15

Capturing Chromosome Conformation Across Length Scales

Published on: January 20, 2023

Area of Science:

  • Molecular Biology
  • Genomics
  • Cell Biology

Background:

  • Eukaryotic genomic DNA is packaged into chromatin with histones, nonhistone proteins, and RNA.
  • The nucleosome, a fundamental unit of DNA wrapped around a histone octamer, forms the initial level of chromatin packaging.
  • Understanding chromatin packaging is essential for comprehending nuclear organization and gene regulation.

Purpose of the Study:

  • To review methods for identifying higher-order chromatin structure.
  • To discuss the insights gained from these methods regarding chromatin organization.
  • To highlight the ongoing research into the mechanisms of chromatin packaging.

Main Methods:

  • Chromatin immunoprecipitation coupled with high-throughput sequencing for nucleosome occupancy maps.
  • Deoxyribonuclease and micrococcal nuclease digestion techniques.
  • Chromosome conformation capture and its variants for analyzing long-range genomic interactions.

Main Results:

  • High-throughput sequencing provides detailed nucleosome occupancy maps.
  • Chromosome conformation capture reveals higher-order structures involving long-range loop formation.
  • These methods have significantly advanced our understanding of chromatin's complex organization.

Conclusions:

  • Advanced molecular and sequencing techniques are revolutionizing the study of chromatin structure.
  • Identifying higher-order chromatin structures is key to understanding genome organization and function.
  • Further research is needed to fully elucidate the mechanisms and implications of chromatin packaging.