DLGAP2 and psychiatric disorder: Many other differentially methylated CpGs were located in or close to genes previously associated with stress and psychiatric disorders, such as the genes for oxytocin (OXT) and DLG Associated Protein 2 (DLGAP2) that have commonly been associated with deficits in social behavior and autism spectrum disorder (Marshall et al., 2008; Feldman et al., 2016).