γ-Glu-Cys is an intermediate in glutathione (GSH) synthesis.1It is formed by ATP-dependent condensation of cysteine and glutamate by γ-glutamylcysteine synthetase. γ-Glu-Cys is also an essential component of phytochelatins, the heavy metal detoxifying enzymes in plants.2

γ-Glu-Cys (ammonium salt)

PBS (pH 7.2):10 mg/mL
Powder: -20°C for 3 years
In solvent: -80°C for 2 years