The tripeptide L-gamma-Glu-L-Val-Gly has a 10fold higher umami “richness” feeling as compared to glutathione. It acts as an agonist to the G-protein conjugation-type receptor (GPCR). Synthesis is from L-valyl-glycine by gamma-glutamyl transferase (GGT).

JSBBA Annual Meeting 2013, Sendai, Symposium LS8, March 26