PPP1R1B and schizophrenia: Since dopamine-and-cAMP-regulated neuronal phosphoprotein (32 kDa) (DARPP-32) is expressed in brain regions receiving dopaminergic projections, including the PFC, and is implicated in the pathophysiology of schizophrenia, Feldcamp et al.[129] determined the DARPP-32 gene expression in suicide victims with schizophrenia.