This probably reflects the robustness and redundancy of plant antioxidative systems
In the first step, the -glutamyl transpeptidase catalyzes the transfer of gamma-glutamyl functional groups from GSH to the cysteinylglycine dipeptide, which is subsequently convert to cysteine and glycine by a cysteinylglycine dipeptidase
Copper-Dependent Enzyme Activation GHK-Cu serves as a bioavailable copper delivery system, providing copper(II) ions to copper-dependent enzymes including superoxide dismutase (SOD), cytochrome c oxidase, and lysyl oxidase
J Biol Chem 278:4686946877 Conklin PL, Foyer CH, Hancock RD, Ishikawa T, Smirnoff N (2024) Ascorbate acid metabolism and functions
Its primary job is to tackle the threat of free radicals
Neuropsychopharmacology 36:24522459