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Neuron 40, 11191131

The pH dependence for formation of both SAG and SGE, with SGE production favored at pH 6.5, further supports the proposed catalytic mechanisms

CPSII Regulation: CPSII is regulated by UTP (uridine triphosphate), which acts as a negative feedback inhibitor of the enzyme

Avoid Incompatible Ingredients: Do not layer GHK-Cu with highly acidic ingredients (like L-ascorbic acid Vitamin C), strong exfoliants (AHAs/BHAs), or potent retinoids in the same session