 FPL2 is often co-expressed with FPR1.It is widely expressed by circulating blood neutrophils, eosinophils, basophils, and monocytes; lymphocyte T cells and B cells; tissue Mast cells, macrophages, fibroblasts, and immature dendritic cells; vascular endothelial cells; neural tissue glial cells, astrocytes, and neuroblastoma cells; liver hepatocytes; various types of epithelial cells; and various types of multicellular tissues.FPR2 is also known as the LXA4 or ALX/FPR2 receptor based on studies finding that is a high affinity receptor for the arachidonic acid metabolite, lipoxin A4 (LXA4), and thereafter for a related arachidonic acid metabolite, the Epi-lipoxin, aspirin-triggered lipoxin A4 (i.e.