Modulates injury-induced and chemical pain hypersensitivity (By similarity). Ligand of FPR1, can chemoattract macrophages, promote phagocytosis and increase ROS release (PubMed:25109685). Expressed in brain (PubMed:15028294). Expressed in LPS-stimulated monocytes and macrophages, especially in polarized M1 (PubMed:25109685). Belongs to the TAFA family.