GRIN2A and schizophrenia: Interestingly, GRIN2A is expressed later in brain development than the genes encoding the GRIN1 and GRIN2B subunits of the NMDA receptor; expression of GRIN2A starts postnatally and rises through juvenile and adolescent stages in humans and rodents, inviting comparison with the typical onset of schizophrenia in adolescence and early adulthood [19–21].