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Related Concept Videos

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...
X-Inactivation01:58

X-Inactivation

The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
X-inactivation01:58

X-inactivation

The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
Regulation of Expression at Multiple Steps01:23

Regulation of Expression at Multiple Steps

The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...
Epigenetic Regulation01:37

Epigenetic Regulation

Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
Epigenetic Regulation01:46

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.

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Related Experiment Video

Updated: Jun 1, 2026

Quick Fluorescent In Situ Hybridization Protocol for Xist RNA Combined with Immunofluorescence of Histone Modification in X-chromosome Inactivation
12:42

Quick Fluorescent In Situ Hybridization Protocol for Xist RNA Combined with Immunofluorescence of Histone Modification in X-chromosome Inactivation

Published on: November 26, 2014

Xist regulation and function explored.

Daphne B Pontier1, Joost Gribnau

  • 1Department of Reproduction and Development, Erasmus MC, Dr. Molewaterplein 50, 3015 GE Rotterdam, The Netherlands.

Human Genetics
|June 1, 2011
PubMed
Summary
This summary is machine-generated.

X chromosome inactivation (XCI) silences one female X chromosome using Xist RNA. This review explores Xist

More Related Videos

Combined DNA-RNA Fluorescent In situ Hybridization (FISH) to Study X Chromosome Inactivation in Differentiated Female Mouse Embryonic Stem Cells
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Combined DNA-RNA Fluorescent In situ Hybridization (FISH) to Study X Chromosome Inactivation in Differentiated Female Mouse Embryonic Stem Cells

Published on: June 14, 2014

A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome
08:27

A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome

Published on: May 22, 2019

Related Experiment Videos

Last Updated: Jun 1, 2026

Quick Fluorescent In Situ Hybridization Protocol for Xist RNA Combined with Immunofluorescence of Histone Modification in X-chromosome Inactivation
12:42

Quick Fluorescent In Situ Hybridization Protocol for Xist RNA Combined with Immunofluorescence of Histone Modification in X-chromosome Inactivation

Published on: November 26, 2014

Combined DNA-RNA Fluorescent In situ Hybridization (FISH) to Study X Chromosome Inactivation in Differentiated Female Mouse Embryonic Stem Cells
15:54

Combined DNA-RNA Fluorescent In situ Hybridization (FISH) to Study X Chromosome Inactivation in Differentiated Female Mouse Embryonic Stem Cells

Published on: June 14, 2014

A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome
08:27

A Non-random Mouse Model for Pharmacological Reactivation of Mecp2 on the Inactive X Chromosome

Published on: May 22, 2019

Area of Science:

  • Genetics
  • Molecular Biology
  • Developmental Biology

Background:

  • X chromosome inactivation (XCI) equalizes gene expression between sexes in mammals.
  • Xist RNA, expressed from the inactive X chromosome, is crucial for silencing.
  • The precise mechanism of Xist-mediated silencing remains largely unknown.

Purpose of the Study:

  • To review current understanding of Xist regulation, structure, function, and conservation.
  • To explore potential mechanisms restricting Xist's action in cis.
  • To discuss alternative dosage compensation strategies and insights from invertebrates.

Main Methods:

  • Literature review of existing research on XCI and Xist.
  • Analysis of current data on Xist structure and function.
  • Comparative genomics and evolutionary biology perspectives.

Main Results:

  • Xist RNA coats the inactive X chromosome, initiating gene silencing.
  • Multiple regulatory factors influence Xist expression and localization.
  • The exact molecular interactions of Xist remain under investigation.

Conclusions:

  • Understanding Xist's cis-restriction mechanisms is key to deciphering XCI.
  • Invertebrate models may offer conserved insights into dosage compensation.
  • Further research is needed to fully elucidate Xist's role in mammalian development.