MDN is believed to be involved in the pathogenesis of schizophrenia (Young et al., 2000; Alelú-Paz and Giménez-Amaya, 2008) and has been shown to play an important role in working memory and episodic memory (Gaffan and Parker, 2000; Watanabe and Funahashi, 2012; Mitchell and Chakraborty, 2013). Here, NT5M is linked to schizophrenia.