ghk-cu coordination lysine carboxyl Copper in GHK relies on four precise nitrogen donors. The N-terminal amine, Gly-His amide N, His-Lys amide N, and histidine imidazole N together stabilize the complex for extracellular matrix studies. For Choose Your Bundle::16oz | 5 Pack Discount Eligible GHK-Cu 50mg | PUREPHARMA
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