GLUTATHIONE: Glutathione is a tripeptide composed of glutamate, cysteine and glycine, with an unusual gamma-glutamyl linkage. Reduced glutathione and oxidised glutathione are distinct analytical species. This redox distinction is especially relevant when defining the substance being measured in a biochemical model. This listing uses a listed presentation; finished-format specifications must be distinguished from the reference molecule. Intended exclusively for controlled in vitro laboratory research; not for human or veterinary use.