Human tissue distribution of hZAC. A human RNA blot was hybridized with a hZAC probe and the signal intensity for each dot was measured by using a storage phosphor imaging system (Bio-Rad). In addition, hZAC was weakly expressed in adult peripheric leucocytes, spinal cord, liver, skeletal muscle, and whole brain (less than 150 units). hZAC was expressed in different brain areas: mainly in the occipital lobe, thalamus, and cerebral cortex (100–150 units), in other areas (amygdala, caudate, cerebellum, frontal lobe, hippocampus, medulla oblongata, putamen, substantia nigra, temporal lobe, and subthalamic nuclei) the signals were very weak (<100 units).