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Related Concept Videos

Replication in Eukaryotes02:31

Replication in Eukaryotes

Overview
Telomeres and Telomerase02:41

Telomeres and Telomerase

In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
Mouse Models of Cancer Study02:43

Mouse Models of Cancer Study

Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
Replication in Eukaryotes01:29

Replication in Eukaryotes

In eukaryotic cells, DNA replication is highly conserved and tightly regulated. Multiple linear chromosomes must be duplicated with high fidelity before cell division, so there are many proteins that fulfill specialized roles in the replication process. Replication occurs in three phases: initiation, elongation, and termination, and ends with two complete sets of chromosomes in the nucleus.
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...
Telomeres and Telomerase02:41

Telomeres and Telomerase

In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.

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Related Experiment Video

Updated: May 13, 2026

Telomerase Activity in the Various Regions of Mouse Brain: Non-Radioactive Telomerase Repeat Amplification Protocol (TRAP) Assay
10:14

Telomerase Activity in the Various Regions of Mouse Brain: Non-Radioactive Telomerase Repeat Amplification Protocol (TRAP) Assay

Published on: September 2, 2014

Are mouse telomeres going to pot?

Peter Baumann1

  • 1Stowers Institute for Medical Research, Kansas City, MO 64110, USA. peb@stowers-institute.org

Cell
|July 15, 2006
PubMed
Summary

Pot1 protein protects telomeres and maintains their length. New studies reveal how Pot1 homologs in mice prevent DNA repair activities at chromosome ends.

Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • Pot1 is a conserved protein essential for telomere protection and length maintenance.
  • Telomeres are critical for genomic stability and preventing chromosome end-to-end fusion.

Purpose of the Study:

  • To investigate the functions of murine Pot1 homologs.
  • To elucidate the mechanisms by which cells protect chromosome ends.

Main Methods:

  • Analysis of Pot1 homologs in mouse models.
  • Studies on DNA repair pathways and their interaction with telomeres.

Main Results:

  • Murine Pot1 homologs play significant roles in telomere maintenance.
  • New insights into the regulation of DNA repair at chromosome ends by Pot1.

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Lineage Tracing of Inducible Fluorescently-Labeled Stem Cells in the Adult Mouse Brain
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Lineage Tracing of Inducible Fluorescently-Labeled Stem Cells in the Adult Mouse Brain

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Related Experiment Videos

Last Updated: May 13, 2026

Telomerase Activity in the Various Regions of Mouse Brain: Non-Radioactive Telomerase Repeat Amplification Protocol (TRAP) Assay
10:14

Telomerase Activity in the Various Regions of Mouse Brain: Non-Radioactive Telomerase Repeat Amplification Protocol (TRAP) Assay

Published on: September 2, 2014

Utilizing Murine Inducible Telomerase Alleles in the Studies of Tissue Degeneration/Regeneration and Cancer
08:34

Utilizing Murine Inducible Telomerase Alleles in the Studies of Tissue Degeneration/Regeneration and Cancer

Published on: April 13, 2015

Lineage Tracing of Inducible Fluorescently-Labeled Stem Cells in the Adult Mouse Brain
09:44

Lineage Tracing of Inducible Fluorescently-Labeled Stem Cells in the Adult Mouse Brain

Published on: May 20, 2022

Conclusions:

  • Pot1 homologs are crucial for safeguarding telomeres from inappropriate DNA repair.
  • Understanding Pot1 function provides insights into cellular mechanisms of genome protection.