Three widely reported schizophrenia susceptibility genes, disrupted in schizophrenia 1 (DISC1), neuregulin 1, and dysbindin, have been shown to regulate new neuron development in adult brain (Falls, 2003; Duan et al., 2007; Kim et al., 2009; Nihonmatsu-Kikuchi et al., 2011). The gene discussed is NRG1; the disease is schizophrenia.