Mitochondrial Oxidation
Mitochondrial Oxidation - Related Videos
11:40
Bioenergetics and the Oxidative Burst: Protocols for the Isolation and Evaluation of Human Leukocytes and Platelets
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Cited by 74 •
2014
Blood leukocytes and platelets can be used as a marker of overall bioenergetic health of an individual and so have the potential to monitor pathological processes and the impact of treatments. Here we describe a method to isolate and measure mitochondrial function and the oxidative burst in these cells.
02:59
Animal Mitochondrial Genetics
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2020
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
03:14
Oxidation Numbers
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2020
In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules. Oxidation Number (Oxidation State) In the case of an ionic compound, oxidation numbers are assigned based on the number of electrons transferred between reacting species. For example, in the formation of calcium...
08:40
An Optimized Protocol to Analyze Glycolysis and Mitochondrial Respiration in Lymphocytes
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Cited by 38 •
2016
The study of metabolism is becoming increasingly relevant to immunological research. Here, we present an optimized method for measuring glycolysis and mitochondrial respiration in mouse splenocytes, and T and B lymphocytes.
02:39
Imaging the Mitochondrial Redox State in Primary Neurons Using a Ratiometric Indicator
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2025
Source: Katsalifis, A., et al. Live Imaging of the Mitochondrial Glutathione Redox State in Primary Neurons using a Ratiometric Indicator. J. Vis. Exp. (2021)This video demonstrates the imaging of mitochondrial redox state in primary neurons using a ratiometric fluorescent indicator. By applying two excitation wavelengths under a fluorescence microscope, the fluorescence intensity ratio is measured to assess mitochondrial oxidation. The protocol includes N-methyl-D-aspartate (NMDA) stimulation...
FAQs
As electrons move through the inner-membrane electron transport chain, the released energy pumps protons across the membrane. This separation creates an electrochemical gradient, meaning a combined difference in proton concentration and electrical charge. ATP synthase uses the gradient as an energy source to drive ATP formation, linking nutrient oxidation to usable cellular energy.
Different stages occur in distinct mitochondrial locations. Pyruvate, fatty acids, and amino acids are oxidized in the matrix to produce NADH and FADH2, whereas their electrons enter the electron transport chain in the inner membrane. This organization places electron transfer, proton pumping, and ATP synthase in a coordinated arrangement that supports efficient oxidative phosphorylation.
Oxygen functions as the terminal electron acceptor, receiving electrons after they pass through the inner-membrane electron transport chain. It then forms water. This final transfer completes the electron-flow pathway and allows the chain to continue supporting proton pumping, which is necessary for maintaining the gradient used by ATP synthase.
These nutrient classes provide distinct entry points into the oxidative pathway. In the mitochondrial matrix, oxidation of pyruvate, fatty acids, and amino acids generates the electron carriers NADH and FADH2. Their contribution therefore connects carbohydrate-, lipid-, and amino-acid-derived metabolism to the shared electron transport and oxidative-phosphorylation system.
Mitochondrial oxidation provides a biochemical framework for examining how cells obtain energy during exercise. Because nutrient oxidation generates electron carriers that support ATP production, this pathway connects fuel use with cellular energy demands. Studying it helps relate biochemical reactions to exercise physiology without treating carbohydrate, lipid, and amino-acid metabolism as isolated processes.
In biochemistry, this topic supports investigation of metabolic regulation, cellular energy production, and disorders associated with impaired mitochondrial function. It also helps researchers connect reactions in the mitochondrial matrix with electron transport and oxidative phosphorylation at the inner membrane. These links provide context for interpreting how altered mitochondrial activity may affect cellular function.