Alternate name: gamma-glutamylcysteine synthetase. This model represents glutamate--cysteine ligase, and enzyme in the biosynthesis of glutathione (GSH). GSH is one of several low molecular weight cysteine derivatives that can serve to protect against oxidative damage and participate in a biosynthetic or detoxification reactions. [Biosynthesis of cofactors, prosthetic groups, and carriers, Glutathione and analogs]