GRIK3 and schizophrenia: It is highly significant in both LS and mPFC arrays, while other glutamate-related genes strongly linked to schizophrenia, such as the kainate receptor 3 (Grik3), and metabotropic glutamate receptors 5 and 7 (Grm5, and Grm7), are only significant in mPFC (Table 1).