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AHK-Cu, or Alanine-Histidine-Lysine-Copper, is a naturally occurring tripeptide complexed with copper that has been investigated for its role in activating copper-dependent enzymatic processes and modulating extracellular matrix proteins involved in tissue structure and repair

KPV represents a tripeptide fragment derived from the C-terminal region of alpha-melanocyte stimulating hormone (-MSH), consisting of the amino acid sequence lysine-proline-valine with molecular formula C16H30N4O4 and molecular weight of 342.43 g/mol

In rodent islets, cells are in the center, surrounded by the other endocrine cells, and make up about 60-80% of the islet