Heme Binding Protein 1 (HEBP1) is an intracellular tetrapyrrole-binding protein. HEBP1 is comprised of a natural chemoattractant peptide of 21 amino acids at the N-terminus, which is a natural ligand for formyl peptide receptor-like receptor 2 (FPRL2) and stimulates calcium mobilization and chemotaxis in monocytes and dendritic cells.