In SCZ and psychosis, there is evidence from candidate genes studies across tissues supporting DNAm differences between cases and controls in genes such as the Parvalbumin (PVALB) gene(Fachim, Srisawat, Dalton, & Reynolds, 2018), GMR2 and GMR5 of the glutamatergic receptors (Kordi-Tamandani, Dahmardeh, & Torkamanzehi, 2013a); various CpG sites in the β2 subunit of the GABAa receptor gene (GABRB2) (Pun et al., 2011; Zong et al., 2017), and in GRIN2B, involved in the function of NMDAR (Fachim et al., 2019). Here, PVALB is linked to psychotic disorder.