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70 Membrane binding influences the activity of GAPDH 89 thereby possibly regulating glycolytic flux

Thus, based on the clear and direct role of Y1-R in promoting glucose uptake in muscle, the lack of any response to GLP-1R agonism, and the glucose-reducing effects of GEP44 observed in our previous studies 16 , we predicted that GEP44 would also promote glucose uptake via interactions with the Y1-R

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Free Cu2+ is toxic (Fenton reactions, hydroxyl radicals), but the GHK-Cu complex is stable, diffusible and delivers copper in a targeted manner to copper-dependent metalloenzymes: lysyl oxidase (collagen/elastin crosslinking), Cu/Zn superoxide dismutase (SOD1, antioxidant defence), tyrosinase (controlled melanogenesis), dopamine-beta-hydroxylase