The evidence for DAOAs involvement in psychosis has been growing with several genetic studies finding an association between polymorphisms in the G72 gene which encodes DAOA, and the development of psychosis (Addington et al., 2004; Craddock et al., 2005; Mossner et al., 2010) as well as severity of positive symptoms (Chiesa et al., 2011). The gene discussed is DAOA; the disease is psychotic disorder.