Main Reaction: S-methyl glutathione >> gamma-Glutamyl-S-methylcysteine + glycine

Reference: PubMed ID: 15234988
Authors: Jones MG, Hughes J, Tregova A, Milne J, Tomsett AB, Collin HA
Title: Biosynthesis of the flavour precursors of onion and garlic.
Published: 2004 Aug

S-methyl glutathione --> gamma-Glutamyl-S-methylcysteine + glycine