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Related Concept Videos

Mitogens and the Cell Cycle02:38

Mitogens and the Cell Cycle

Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
Mitogens and the Cell Cycle02:38

Mitogens and the Cell Cycle

Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
S-Cdk Initiates DNA Replication02:38

S-Cdk Initiates DNA Replication

The cell cycle is a series of events leading to DNA duplication followed by the division of cell content to form two daughter cells. The cell cycle progresses in four stages—the cell increases in size (gap 1 or G1-phase), duplicates its DNA (synthesis or S-phase), prepares to divide (gap 2 or G2-phase), and divides (mitosis or M-phase).
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of replication.
S-Cdk Initiates DNA Replication02:38

S-Cdk Initiates DNA Replication

The cell cycle is a series of events leading to DNA duplication followed by the division of cell content to form two daughter cells. The cell cycle progresses in four stages—the cell increases in size (gap 1 or G1-phase), duplicates its DNA (synthesis or S-phase), prepares to divide (gap 2 or G2-phase), and divides (mitosis or M-phase).
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of replication.
Cells Coordinate Growth and Proliferation02:36

Cells Coordinate Growth and Proliferation

Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
Cells Coordinate Growth and Proliferation02:36

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Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...

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Manipulation and Analysis of Cell Cycle-Dependent Processes in Budding Yeast
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Keith's MAGIC: Cloning and the Cell Cycle.

D N Wells1

  • 1AgResearch , Hamilton, New Zealand .

Cellular Reprogramming
|September 12, 2013
PubMed
Summary
This summary is machine-generated.

Adult somatic cells can be reprogrammed by oocyte factors to create a cloned individual through nuclear transfer (NT). This groundbreaking discovery proved that adult cell nuclei are totipotent, challenging previous beliefs about cell fate irreversibility.

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Last Updated: May 8, 2026

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Area of Science:

  • Reproductive biology
  • Developmental biology
  • Cellular reprogramming

Background:

  • The prevailing scientific dogma held that cell fate determination involved irreversible changes to the genetic material.
  • Nuclear transfer (NT) into oocytes was explored as a potential method for cell reprogramming.

Discussion:

  • Professor Keith Campbell's work demonstrated that adult somatic cell nuclei can be fully reprogrammed by oocyte factors.
  • This reprogramming capability leads to the formation of a cloned individual, challenging established biological principles.

Key Insights:

  • The seminal experiment proved the totipotency of adult somatic nuclei.
  • It confirmed that adult cells can differentiate without irreversible genetic alterations, overturning previous assumptions.

Outlook:

  • This research laid the foundation for advancements in cloning technology and regenerative medicine.
  • Understanding nuclear reprogramming mechanisms continues to be a vital area of biological research.