Glutathione is a: (A) Dipeptide, (B) Polypeptide, (C) Tripeptide, (D) Oligopeptide
Answer is C. Glutathione is -glutamyl cysteinyl glycine, i.e. glutathione is a tripeptide made up of 3 aminoacyl residues - Glutamate, Cysteine, Glycine Gluta - Glutamate Thi- Sulfur containing (Cysteine) One- Glycine (1 C amino acid) Glutathione is the major intracellular reducing substance/anti-oxidant SH group of glutathione is responsible for its antioxidant function.