GRIN1 and schizophrenia: Particularly, early postnatal ablation of the obligate NMDAR subunit gene Grin1 in GABAergic interneurons (Belforte et al., 2010; Nakao et al., 2018; Bygrave et al., 2019; Alvarez et al., 2020) resembles global Grin1-loss in their constellation of schizophrenia-like behavioral and neural circuit aberrations (Mohn et al., 1999).