DAO has been associated with susceptibility to schizophrenia (Chumakov et al., 2002; Liu et al., 2004; Schumacher et al., 2004; Corvin et al., 2007; Wood et al., 2007; but see Yamada et al., 2005; Liu et al., 2006; Vilella et al., 2007) and in addition, its putative activator, G72 (DAOA), also shows association with the disorder (Chumakov et al., 2002; Detera-Wadleigh & McMahon, 2006; Corvin et al., 2007; Li & He, 2007; Yue et al., 2007; but also see Liu et al., 2006; Wood et al., 2007). This evidence concerns the gene DAOA and schizophrenia.