In glutathione which amino acid is reducing agent?: (A) Glutamic acid, (B) Cysteine, (C) Glycine, (D) Alanine
Answer is B. -Glutathione is a tripeptide (Gamma Glutamic acid +Cysteine + Glycine)- Gamma glutamyl cysteinyl Glycine-Atypical peptide bond is present between Gamma Glutamic acid and cysteine.