Receptor that may have an important role in cell/cell signaling during nervous system formation. Expressed in the brain, where it is localized principally in the ependymal cell layer, choroid plexus and the area postrema. Also found in spinal cord and in the eye. First detected at 6 dpc. Predominantly expressed in the developing CNS, the emerging dorsal root ganglia and cranial ganglia. In the CNS, expression is uniform along the rostrocaudal axis. During gastrulation, it is expressed in the vicinity of the primitive streak, and becomes predominant in that area at late gastrulation. At 10 dpc, detected in ventricular zones (VZ), but not in marginal zones (MZ), and weakly in other structures. Between 12 dpc and 15 dpc, a high expression is present in the VZ in all brain areas. No expression in differentiated neuronal fields. In the newborn and postnatal stages, expression remains restricted to the VZ. Also found weakly in fetal lungs, kidney and epithelia. The iron and 2-oxoglutarate dependent 3-hydroxylation of aspartate and asparagine is (R) stereospecific within EGF domains. Belongs to the G-protein coupled receptor 2 family. LN-TM7 subfamily.