glutathione

Among these residues, the thiol group (–SH) on the cysteine residue is the key functional site responsible for the reducing activity of GSH. This thiol group can donate electrons to oxidizing substances, thereby reducing peroxides. At the same time, two GSH molecules are converted into ...

The antioxidant enzyme defense system is an important barrier by which cells resist reactive oxygen species-induced damage. Superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px/GPx) form a continuous reaction chain that removes superoxide anions, hydrogen peroxide, and ...

Thiol and disulfide status are important chemical indicators for evaluating redox balance, protein structural stability, and the degree of stress-induced damage in biological samples. Measuring thiol content alone usually reflects only the level of reactive reduced species under a specific ...

Glucose-6-phosphate dehydrogenase (G6PD) is the key rate-limiting enzyme of the oxidative phase of the pentose phosphate pathway (PPP). It catalyzes the oxidation of glucose-6-phosphate (G6P) to 6-phosphoglucono-δ-lactone while reducing NADP⁺ to NADPH. NADPH is pivotal for antioxidant ...

Methionine (Met) is a sulfur-containing essential amino acid and a key node in protein synthesis, one-carbon metabolism and methylation networks, and redox homeostasis maintained via the transsulfuration pathway.

Glutathione (GSH) is one of the most important low-molecular-weight thiols in cells. It participates in reactive oxygen species (ROS) detoxification, maintains protein thiols in a reduced state, drives the glutathione peroxidase/reductase cycle, and—together with oxidized glutathione ...

Glutathione is a tripeptide antioxidant naturally produced in the body, and it plays a crucial role in safeguarding our proteins and DNA from damage caused by free radicals and oxidative stress. Beyond its physiological functions, this highly versatile molecule—and the proteins that interact ...

Glutathione (GSH) is a tripeptide composed of glutamate, cysteine, and glycine. It is one of the most important small-molecule reductants in cells, helping maintain redox balance, scavenge reactive oxygen species, and protect biomacromolecules from oxidative damage. Glutathione S-transferases ...

Antioxidants protect biological systems from oxidative damage produced by oxygen-containing free radicals and redox transition metal ions such as iron, copper and cadmium.