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Related Concept Videos

Redox Equilibria: Overview01:23

Redox Equilibria: Overview

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A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
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Redox Reactions01:24

Redox Reactions

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Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
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Redox Reactions01:27

Redox Reactions

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Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
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Ladder Diagrams: Redox Equilibria01:30

Ladder Diagrams: Redox Equilibria

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Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
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Balancing Redox Equations02:58

Balancing Redox Equations

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Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
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What is an Electrochemical Gradient?01:26

What is an Electrochemical Gradient?

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Adenosine triphosphate, or ATP, is considered the primary energy source in cells. However, energy can also be stored in the electrochemical gradient of an ion across the plasma membrane, which is determined by two factors: its chemical and electrical gradients.
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Related Experiment Video

Updated: Feb 25, 2026

In Vivo Imaging of Reactive Oxygen Species in a Murine Wound Model
06:40

In Vivo Imaging of Reactive Oxygen Species in a Murine Wound Model

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Wound redox gradients revisited.

Philipp Niethammer1

  • 1Cell Biology Program, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA.

Seminars in Cell & Developmental Biology
|July 29, 2017
PubMed
Summary

Redox gradients are crucial for tissue repair and development. This study explores how redox signaling guides these processes, using zebrafish wound healing as a model.

Keywords:
BiosensorChemotaxisImagingMetabolic gradientNADPH oxidaseNeutrophilReactive oxygen speciesRedox gradientSignalingWound healingZebrafish

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Area of Science:

  • Physiology
  • Developmental Biology
  • Cell Signaling

Background:

  • Redox gradients, which involve the balance of oxidation-reduction reactions, are increasingly recognized for their role in fundamental biological processes.
  • These gradients are implicated in tissue morphogenesis, inflammation, and the complex mechanisms of regeneration and healing.

Purpose of the Study:

  • To explore the role of redox signaling in guiding physiological processes over distances within an animal.
  • To discuss current hypotheses on how redox patterns are sensed and spatially regulated during tissue repair.

Main Methods:

  • The study focuses on redox signaling during the wound response in zebrafish.
  • Observational and theoretical discussion of sensing and spatial regulation mechanisms.

Main Results:

  • Evidence suggests redox gradients are key regulators of tissue repair and development.
  • The zebrafish wound response provides a model system to understand these spatial regulations.

Conclusions:

  • Redox signaling plays a critical role in coordinating complex physiological processes like tissue regeneration and healing.
  • Understanding how redox gradients are sensed and regulated is essential for deciphering animal development and repair mechanisms.