The orphan receptor ChemR23 (also referred to as CMKLR1 or DEZ) is a G-protein coupled receptor (GPCR) with homology to neuropeptide and chemoattractant receptors. ChemR23 is also a Gai-linked receptor expressed primarily by monocytes, MFs, and plasmacytoid dendritic cells. CMKLR1 has been shown to be expressed by DC generated in vitro from monocytes, to mediate their migration to the proteolytically regulated chemoattractant chemerin, and CMKLR1 may be a key mediator of pDC recrui™ent from the blood into tissue sites enriched in active chemerin.