Isoform 1 and isoform 2 are expressed in prostate and testis. Isoform 2 is expressed in male and female brain at equivalent levels, in particular in cerebellum, cerebral cortex, corpus callosum, occipital, parrietal and temporal lobes, and pons, but not in amygdala, cerebral peduncle, hippocampus and thalamus. Belongs to the PATE family.