Expressed in the neuronal fibers of the medial part of lateral habenula nucleus, thalamus, hypothalamus, stria terminalis, zona incerta, amygdaloid body and cingulum, olfactory bulb, hippocampus, cerebral cortex and cerebellum. In the cerebellum there is a predominant expression pattern in the granule layer of lobules VI-IX of the posterior lobe. Belongs to the FXYD family.