Explain why the systematic name of Glutathione is gamma-glutamyl-L-cysteinylglycine

Answer 1

It is named as such because it is a tripeptide composed of glycine, cysteine and glutamic acid. Glycine is at the C terminus and glutamic acid is at the N terminus, with cysteine in between. The bond between the glutamic acid and the cysteine is via the gamma carboxyl group of the glutamic, hence the inclusion of the term gamma in the name. Hope this is clear.

L-glutamic acid -- L-cysteine -- glycine (structure of glutathione)

N-terminus ...............................C-terminus