Palmitoyl Tetrapeptide-7 stimulates expression of GCP-2 (Granulocyte Chemotactic Protein), which is a chemotactic protein that can recruit cells involved in the preparation and cleansing of the site, to damaged areas. Palmitoyl Tetrapeptide-7 is also called Rigin. Rigin is a synthetic peptide that is a fragment of immunoglobulin G that has been combined with palmitic acid to make it more lipophillic and thus enhance its affinity towards human skin. Rigin is a peptide that mimics DHEA in the skin.