PPP1R1B and schizophrenia: We could point out several suggestions from these results: (1) DARPP-32 and CaN were usually coexistent in the brain, even if in schizophrenia, (2) the balance between DARPP-32 and CaN was greatly disrupted in schizophrenia, and (3) these ware consistent with the results of the above previous postmortem studies review.