GRIA1 and schizophrenia: In any event, the PGC2 analysis (Schizophrenia Working Group of the Psychiatric Genomics Consortium, 2014) does implicate several candidate genes, with genome-wide significant findings for loci containing the dopamine D2 receptor (DRD2 – the ultimate schizophrenia candidate gene) and several glutamate receptors (GRIN2A, GRIA1, GRM3).