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What is Glycolysis?00:56

What is Glycolysis?

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Overview
Cells make energy by breaking down macromolecules. Cellular respiration is the biochemical process that converts "food energy" (from the chemical bonds of macromolecules) into chemical energy in the form of adenosine triphosphate (ATP). The first step of this tightly regulated and intricate process is glycolysis. The word glycolysis originates from the Latin glyco (sugar) and lysis (breakdown). Glycolysis serves two main intracellular functions: generating ATP and generating...
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Outcomes of Glycolysis01:13

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Nearly all the energy used by cells comes from the bonds that make up complex organic compounds. These organic compounds are broken down into simpler molecules, such as glucose. As a result, cells extract energy from glucose over many chemical reactions—a process called cellular respiration.
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Oxidations of Aldehydes and Ketones to Carboxylic Acids01:15

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Oxidation of aldehydes and ketones results in the formation of carboxylic acids. Aldehydes, bearing hydrogen next to the carbonyl group, are easily oxidized compared to ketones. This is because an aldehydic proton can easily be abstracted during oxidation.
Aldehydes readily undergo oxidation in strong oxidizing agents such as potassium permanganate and chromic acid. The oxidation can also be carried out using mild oxidizing agents such as silver oxide. In fact, aldehydes can be easily oxidized...
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Oxidation of Alcohols02:37

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In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
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Pyruvate Oxidation01:15

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After glycolysis, the charged pyruvate molecules enter the mitochondria via active transport and undergo three enzymatic reactions. These reactions ensure that pyruvate can enter the next metabolic pathway so that energy stored in the pyruvate molecules can be harnessed by the cells.
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Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
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Updated: Mar 30, 2026

Synthesis of Indoxyl-glycosides for Detection of Glycosidase Activities
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Glyoxalase biochemistry.

John F Honek

    Biomolecular Concepts
    |November 10, 2015
    PubMed
    Summary

    The glyoxalase enzyme system detoxifies harmful methylglyoxal using glutathione. Maintaining low methylglyoxal levels is crucial for preventing cellular damage and associated medical conditions.

    Area of Science:

    • Biochemistry
    • Cell Biology
    • Metabolism

    Background:

    • The glyoxalase system is essential for cellular detoxification.
    • It uses intracellular thiols, like glutathione, to metabolize α-ketoaldehydes.
    • Methylglyoxal, a reactive byproduct, can cause cellular damage if not controlled.

    Purpose of the Study:

    • To provide an overview of the glyoxalase enzyme system.
    • To discuss its various biochemical aspects.
    • To elucidate its cellular functions and importance.

    Main Methods:

    • Literature review of glyoxalase system research.
    • Analysis of biochemical pathways involving methylglyoxal.
    • Discussion of the physiological relevance of glyoxalase activity.

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    Main Results:

    • The glyoxalase system efficiently converts methylglyoxal to D-hydroxyacids.
    • Cellular methylglyoxal levels are tightly regulated.
    • Elevated methylglyoxal is linked to significant medical symptoms due to protein, lipid, and nucleic acid modification.

    Conclusions:

    • The glyoxalase system plays a vital role in maintaining cellular homeostasis.
    • Effective control of methylglyoxal is critical for preventing toxicity.
    • Understanding this system is key to addressing diseases associated with methylglyoxal accumulation.