GHK Cu is the copper(II) complex of the tripeptide glycyl L histidyl L lysine (GHK), formed through high affinity copper coordination. In vitro studies use GHK Cu to examine copper binding chemistry and how copper complexation can influence gene expression patterns and extracellular matrix related signaling readouts in cultured cells. GHK Cu is used in research focused on peptide metal coordination, metalloproteinase associated pathways, and broader copper dependent biochemical regulation in experimental models.

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