Prolactin-Releasing Peptide (12-31), rat is a fragment of the prolactin releasing peptide (PrRP) . Prolactin-Releasing Peptide (12-31), rat shows high affinity for GPR10 receptors. Prolactin-Releasing Peptide (12-31), stimulates calcium mobilization in CHOK1 cells transfected with the PrRP receptor[1][2].