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That binding initiates cascades of internal signals, turning genes on or off or altering ion flows
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Two of the most commonly referenced forms are: GHK-Cu (Copper Tripeptide-1) AHK-Cu (Copper Tripeptide-3) While both belong to the copper peptide family, they are used differently in cosmetic formulation depending on whether the goal is skin-focused or scalp- and hair-focused performance
PMID 18463283
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