The short version of oxidized glutathione fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2025-11-19 and is reviewed periodically as new material appears.
Synthesis occurs in two ATP-dependent steps. The enzyme glutamate-cysteine ligase joins glutamate and cysteine to form gamma-glutamylcysteine, and glutathione synthetase adds glycine. The first step is rate-limiting and is influenced by cysteine availability and feedback inhibition by GSH. Breakdown involves gamma-glutamyl transferase and subsequent peptidases, which release constituent amino acids for reuse. Because turnover differs among tissues, measurements from blood, plasma, and tissues are not directly interchangeable. Research continues to clarify how compartment-specific pools are regulated in health and disease.
Glutathione is a tripeptide composed of glutamate, cysteine, and glycine. It contains an unusual gamma-glutamyl bond between glutamate and cysteine, which resists cleavage by many peptidases. The reduced form, GSH, carries a thiol group on cysteine and is the dominant intracellular form in most cells. Its structure allows it to participate in redox reactions and to serve as a sulfur donor. The oxidized form, GSSG, consists of two GSH molecules joined by a disulfide bond.
Glutathione synthesis proceeds in two ATP-dependent steps catalyzed by glutamate-cysteine ligase and glutathione synthetase. The first step joins glutamate and cysteine to form gamma-glutamylcysteine and is generally rate-limiting. The second step adds glycine to complete the tripeptide. Cysteine availability, feedback inhibition by glutathione, and oxidative conditions influence flux through this pathway. The pathway is conserved across many organisms, and degradation by gamma-glutamyl transpeptidase and related peptidases recycles amino acids for new synthesis.
Within cells, glutathione serves as a cofactor for glutathione peroxidases and glutathione S-transferases. These enzymes reduce hydrogen peroxide and organic peroxides or conjugate electrophilic compounds to the thiol group. The resulting conjugates can be exported and processed through mercapturic acid pathways. Glutathione also contributes to protein thiol homeostasis and to recycling of other antioxidants such as ascorbate. Its precise roles vary by tissue, and many regulatory effects observed in laboratory systems remain difficult to quantify in whole organisms.
Glutathione is a tripeptide composed of glutamate, cysteine, and glycine. It occurs in nearly all living cells, with highest concentrations in liver, kidney, and red blood cells, and exists in reduced (GSH) and oxidized disulfide (GSSG) forms. The cysteine thiol group enables reversible oxidation and reduction reactions. This property makes glutathione a central participant in cellular redox balance. The balance between these forms is often used as an indicator of oxidative stress.
| Property | Value | Notes |
|---|---|---|
| Chemical formula | C10H17N3O6S | For reduced glutathione; the oxidized dimer has two sulfur atoms. |
| Molar mass | 307.32 g/mol | Calculated for the reduced form. |
| Appearance | White to off-white crystalline powder | Typical for solid reagent; solutions are usually colorless. |
| Solubility | Freely soluble in water | Poorly soluble in nonpolar organic solvents. |
| Typical storage | -20 °C, desiccated, protected from light | Limits oxidation, moisture uptake, and degradation. |
Insect pests such as the potato tuber moth and Colorado potato beetle, which are predicted to spread into areas currently too cold for them. Aphids which act as vectors for many potato viruses and will spread under increased temperatures. Pathogens causing potato blackleg disease (e.g. Dickeya) grow and reproduce faster at higher temperatures. Bacterial infections such as Ralstonia solanacearum will benefit from higher temperatures and spread more easily through flash flooding. Late blight benefits from higher temperatures and wetter conditions. Late blight is predicted to become a greater threat in some areas (e.g. in Finland) and become a lesser threat in others (e.g. in the United Kingdom).
=== 2014: Merger with Burger King === On August 24, 2014, American fast-food chain Burger King announced that it was in negotiations to merge with Tim Hortons Inc.; the proposed $18 billion mergers would involve a tax inversion into Canada, with a new holding company majority-owned by 3G Capital, and the remaining shares in the company held by current Burger King and Tim Hortons shareholders. A Tim Hortons representative stated that the proposed merger would allow Tim Hortons to leverage Burger King's resources for international growth; the two chains would retain separate operations post-merger. News of the proposal caused Tim Hortons' shares to increase in value by 28 percent. On August 25, 2014, Burger King officially confirmed its intent to acquire Tim Hortons Inc. in a deal totaling CA$12.5 billion (US$11.4 billion). 3G Capital offered to purchase the company at $65.50 per share, with existing shareholders receiving $65.50 in cash and 0.8025 shares in the new holding company: per-share—all-cash ($88.50) and all-shares (3.0879) options were also made available. The agreement planned to result in 3G Capital (which held a 71% majority stake in Burger King) holding a 51% majority stake in the new company, Tim Hortons' existing shareholders owning 22%, and Burger King's owning 27% with the new entity based in Oakville and listed on both the TSX and New York Stock Exchange.
== Marketing == In the 1980s, the Brazilian Gracie family marketed açaí as an energy drink or as crushed fruit served with granola and bananas; this demand led to the building of cottage industries and processing plants to pulp and freeze açaí for export.
The American Diabetes Association recommends a goal of keeping hemoglobin A1C levels under 7% for most adults and 7.5% for children. The goal of insulin therapy is to mimic normal pancreatic insulin secretion: low levels of insulin are constantly present to support basic metabolism, plus the two-phase secretion of additional insulin in response to high blood sugar, then an extended phase of continued insulin secretion. This is accomplished by combining different insulin preparations that act with differing speeds and durations. The standard of care for type 1 diabetes is a bolus of rapid-acting insulin 10–15 minutes before each meal or snack, and as-needed to correct hyperglycemia. In addition, constant low levels of insulin are achieved with one or two daily doses of long-acting insulin, or by steady infusion by an insulin pump. The exact dose of insulin appropriate for each injection depends on the content of the meal/snack, and the person's sensitivity to insulin, and is therefore typically calculated by the individual with diabetes or a family member by hand or assistive device (calculator, chart, mobile app, etc.). People who cannot manage these intensive insulin regimens are sometimes prescribed alternate plans relying on mixtures of rapid- or short-acting and intermediate-acting insulin, which are administered at fixed times along with meals of pre-planned times and carbohydrate composition.
Sources: en.wikipedia.org
The cyanogenic glycosides in some white clover (Trifolium repens) varieties may influence the Se requirement, presumably because of cyanide from the aglycone released by glucosidase activity in the rumen and inactivation of glutathione peroxidases by the effect of absorbed cyanide on the glutathione moiety. In areas where selenium deficiency in livestock is a concern, selenium (as selenite) may be supplemented in feed. Certain countries, e.g., the US and Canada, regulate such supplementation. Neonate ruminants at risk of WMD may be administered both Se and vitamin E by injection; some of the WMD myopathies respond only to Se, some only to vitamin E, and some to either.
== Prime Minister of Thailand (2024–2025) == Following the removal of Srettha as prime minister by the Constitutional Court of Thailand on 14 August 2024, Paetongtarn was nominated by Pheu Thai to succeed him. Her nomination was approved by the House of Representatives on 16 August after no alternatives were named by the other parties in the ruling coalition, making her the youngest person and the second woman to become Prime Minister of Thailand. She was officially sworn in on 18 August following an endorsement from King Vajiralongkorn, followed by her cabinet on 6 September. Her premiership has been plagued by the return of her father Thaksin Shinawatra, a prominent and highly controversial political figure of Thailand. This led to a vote of no-confidence by the opposition, alleging that she has allowed her father to control the Thai government and does not have her own autonomy to run the country – Paetongtarn survived this and remained in position.
== Terminology == In the United Kingdom, the name or names of the fruit followed by juice can only legally be used to describe a product that is 100% fruit juice, as required by the Fruit Juices and Fruit Nectars (England) Regulations and the Fruit Juices and Fruit Nectars (Scotland) Regulations 2003. However, a juice made by reconstituting concentrate can be called juice. A product described as fruit "nectar" must contain at least 25% to 50% juice, depending on the fruit. A juice or nectar including concentrate must state that it does. The term "juice drink" is not defined in the Regulations and can be used to describe any drink that includes juice, whatever the amount. Comparable rules apply in all EU member states in their respective languages. In the US, fruit juice can only legally be used to describe a product that is 100% fruit juice. A blend of fruit juice(s) with other ingredients, such as high-fructose corn syrup, is called a juice cocktail or juice drink. According to the Food and Drug Administration (FDA), the term "nectar" is generally accepted in the US and in international trade for a diluted juice to denote a beverage that contains fruit juice or puree, water, and artificial sweeteners. "No added sugar" is commonly printed on the labels of juice containers, but the products may contain large amounts of naturally occurring sugars; however, sugar content is listed with other carbohydrates on labels in many countries.
The VIP gets 200 armor and has 150% movement speed; they also have a unique skin for identification purposes. Formerly, there was a fourth objective called Escape. In this scenario, the terrorist team had to "escape" to a designated escape point while the Counter-Terrorist team tried to kill them. When half of the team has managed to escape, the Terrorists win the round. Following each of the eight rounds of play, the two sides will trade roles. If one team eliminates the other, either team can win the scenario. A heads-up display (HUD) shows information to assist players during gameplay. The action indicator in the top right displays the names of players who are killed and the weapon used. The radar, or mini-map, shows the positions of teammates and other relevant map details. The HUD displays the player's health, armor, ammunition, and money as well as the round timer. On the left side, icons indicate important locations such as hostage rescue areas, VIP escape points, buy zones, and bomb sites, and in bomb defusal maps, it shows whether the player is carrying the C4 bomb or a defuse kit. There are three categories of weapons: melee (knife), secondary (handguns), and primary (rifles, shotguns, machine guns, and submachine guns). Players are only allowed to carry one weapon of each category at a time. There is a separate category for equipment like defusing kits and hand grenades which do not have the same carry limits.
While the role of rain water δD as the fundamental control on the final δD of lipids is well documented, the importance of fractionation effects from rain water to soil water and leaf water on εl/w is appreciated but remains poorly understood. Organic biomolecules are generally depleted relative to the δD of leaf water. However, differences between organisms, biosynthetic pathways, and biological roles of different molecules can lead to huge variability in fractionation; the diversity of lipid biomarkers spans a 600‰ range of δD values. Lipid biosynthesis is biochemically complex, involving multiple enzyme-dependent steps that can lead to isotope fractionations. There are three major pathways of lipid biosynthesis, known as the mevalonate pathway, the acetogenic pathway, and the 1-deoxyD-xylulose-5-phosphate/2-methylerythroyl-4-phosphate pathway. The acetogenic pathway is responsible for the production of n-alkyl lipids like leaf waxes, and is associated with a smaller δD depletion relative to source water than the other two lipid biosynthesis pathways. While leaf water is the main source of hydrogen in leaf biomolecules, relatively depleted hydrogen from acetate or NADPH is often added during biosynthesis, and contributes to the HIC of the final molecule. Secondary hydrogen exchange reactions, meaning hydrogenation and dehydrogenation reactions outside of the primary biosynthetic pathway, also contribute substantially to the variability of lipid HIC.
Sources: en.wikipedia.org
GSH is the reduced form with a free thiol group, while GSSG is the oxidized disulfide-linked dimer. Most assays distinguish the two because their balance reflects redox conditions. The names are not interchangeable.
It is synthesized in the body from amino acids, so it is not classified as an essential dietary nutrient for most people. Dietary and supplemental forms are studied for their effects on tissue levels and health markers. Evidence varies by population and outcome.
The phrase highlights its high intracellular concentration and its role in several antioxidant and detoxification reactions. It is not the only antioxidant, and the term can oversimplify its functions. Scientific descriptions usually specify the pathway or enzyme involved.
GSH is the reduced thiol form, while GSSG is the disulfide-linked oxidized dimer. The GSH:GSSG ratio is used as a redox indicator, though the ratio can vary with sample handling and cell type.