Glutathione research peptide is supplied to qualified Canadian institutions as a characterized laboratory material for in vitro redox, enzymology, and analytical work. The compound is the reduced tripeptide γ-glutamyl-cysteinyl-glycine (GSH), the principal low-molecular-weight thiol in most eukaryotic cells.

In vitro, glutathione participates in thiol–disulfide exchange and is the electron donor for glutathione peroxidases and glutathione S-transferases. The unusual γ-peptide bond between glutamate and cysteine resists cleavage by ordinary aminopeptidases, which is why the tripeptide persists as a discrete reagent in cell-free and cell-culture systems. Laboratories typically use it as a defined reducing equivalent, a calibration standard, or a control ligand when mapping GSH-dependent enzymes and the GSH/GSSG couple.

The material is offered lyophilized in the reduced form. Identity data (CAS 70-18-8, formula C10H17N3O6S, molecular weight 307.3 g/mol, PubChem CID 124886) are listed on the specification table. Solutions air-oxidize to GSSG; prepare fresh under the receiving laboratory's chemical-hygiene plan and store the closed lyophilized vial at −20 °C, protected from light.

Lots are sourced from a GMP-aligned peptide manufacturing partner and released against the stated HPLC purity for that lot (≥98% by HPLC, lot-specific). Identity, chromatographic purity, and related analytical results are documented on the lot certificate of analysis (COA). Retain the COA with the inventory record.

This listing is a research-use-only peptide offered to qualified Canadian institutions for in vitro and laboratory use. Purchasing access is limited to verified Canadian research institutions; individual consumer accounts are not accepted. It is not for human or veterinary use, is not intended for diagnostic procedures, and has not been evaluated or authorized by Health Canada as a drug, diagnostic, or medical product.