Summary
Glutathione (GSH) is a tripeptide composed of glutamate, cysteine, and glycine. It is widely regarded in the biochemistry literature as the dominant intracellular thiol antioxidant and a key participant in cellular redox homeostasis.
Overview
Glutathione is present at millimolar concentrations in most cell types and cycles between a reduced thiol form (GSH) and an oxidized disulfide form (GSSG). The GSH/GSSG ratio is one of the most-used quantitative indicators of intracellular redox state in biochemistry and cell biology.
Research Background
Glutathione was identified in 1888 by de Rey-Pailhade and chemically characterized by Hopkins in the 1920s. Modern glutathione biology spans foundational work on the gamma-glutamyl cycle (Meister and colleagues), glutathione-S-transferase enzymes (Boyer, Mannervik), and oxidative-stress literature more broadly.
Mechanisms Studied
Mechanistic interest centers on glutathione’s role as a redox buffer, a substrate for glutathione-S-transferase enzymes that conjugate reactive electrophiles, a participant in detoxification of xenobiotic compounds, and a marker of oxidative stress when the GSH/GSSG ratio shifts.
Published Research Summary
Lu (2013) provides a comprehensive review of glutathione synthesis and biological function. Meister and Anderson (1983) provide a foundational review of glutathione biochemistry. A vast cell-biology literature has characterized glutathione in essentially every common cell type and tissue.
Quality & Verification
For research compounds, lot-level documentation is the starting point for any analytical work. Researchers commonly examine batch-specific Certificates of Analysis, reversed-phase HPLC purity readouts, mass-spectrometry confirmation of molecular weight, and lot identification to evaluate compound identity, purity, and consistency before downstream experiments.