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Related Concept Videos

Body Temperature01:25

Body Temperature

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The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
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Body Temperature01:07

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Body temperature reflects the equilibrium between heat production and heat loss within the body. Most heat is generated by metabolically active tissues, particularly the liver, heart, brain, kidneys, and endocrine organs. At rest, skeletal muscles contribute 20–30% of total heat production, but during vigorous exercise, this can increase up to 30–40 times.
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Centroid of a Body01:16

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The centroid is an important concept in engineering, physics, and mechanics. It is the geometric center of a body. It always lies within the body except in cases with holes or cavities. When the material that a body is composed of is uniform or homogeneous, the centroid coincides with its center of mass or the center of gravity.
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Free-body Diagram01:28

Free-body Diagram

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In mechanics, understanding the motion of objects is essential, and one tool that helps solve this problem is the free-body diagram. It is a simple but powerful graphical representation that succinctly represents all the forces acting on an object. A free-body diagram can represent a stationary or moving object, and is used in mechanics to explain the cause of an object's motion.
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Composite Bodies00:55

Composite Bodies

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A composite body is a body made up of multiple parts, connected to form a larger, unified object. Each part has its own weight and center of gravity, which must be considered to determine the center of gravity of the composite body. In cases where the density or specific weight is constant, the center of gravity coincides with the centroid.
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Whole Body Regeneration01:33

Whole Body Regeneration

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Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential;...
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Related Experiment Video

Updated: Feb 4, 2026

Purification of Ubiquitinated p53 Proteins from Mammalian Cells
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Purification of Ubiquitinated p53 Proteins from Mammalian Cells

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Crosstalk between p53 modifiers at PML bodies.

Sonja Matt1, Thomas G Hofmann1

  • 1German Cancer Research Center (dkfz), Cellular Senescence Group, DKFZ-ZMBH Alliance, Heidelberg Germany.

Molecular & Cellular Oncology
|September 26, 2018
PubMed
Summary

The tumor suppressor protein p53 (TP53) is crucial for DNA damage response. Its regulation by post-translational modifications at promyelocytic leukemia nuclear bodies (PML-NBs) is influenced by interactions among its regulators.

Keywords:
DNA damageHIPK2PMLSIRT1apoptosiscrosstalknuclear bodyp53

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Area of Science:

  • Molecular biology
  • Cancer research
  • Cellular regulation

Background:

  • Tumor protein p53 (TP53) is a critical tumor suppressor frequently mutated in cancer.
  • p53 governs cellular responses to DNA damage, influencing cell fate.
  • Post-translational modifications regulate p53 activity.

Purpose of the Study:

  • To investigate the role of promyelocytic leukemia nuclear bodies (PML-NBs) in p53 regulation.
  • To explore the crosstalk between p53 regulators at PML-NBs.
  • To understand how these interactions shape p53 post-translational modifications and function.

Main Methods:

  • The study likely involves molecular biology techniques to analyze protein interactions and modifications.
  • Investigating the localization and activity of p53 and its regulators within PML-NBs.
  • Assessing the impact of regulator crosstalk on p53 function.

Main Results:

  • p53 interacts with numerous regulators at PML-NBs.
  • Crosstalk among p53 regulators at PML-NBs influences p53's post-translational modification status.
  • These modifications, in turn, affect p53's role in cell fate decisions.

Conclusions:

  • PML-NBs serve as crucial hubs for integrating signals that regulate p53.
  • Interactions between p53 regulators at PML-NBs are key to controlling p53 function.
  • Targeting these interactions could offer novel therapeutic strategies in cancer treatment.