GRIN2B and schizophrenia: ANCOVAs correcting for brain pH and PMI confirmed that there was no overall difference in GluN2B protein density between schizophrenia and control subjects (F1,34 = 2.004, p = 0.166) and that there was a significant effect between the 4 hemisphere-specific subgroups (F3,32 = 3.824, p = 0.019).