Mutations and copy number variants in neurexins are associated with characteristic changes in human behavior [13], and variation in the NRXN1 gene is genetically associated with autism spectrum, Tourette syndrome, schizophrenia, developmental delay, intellectual disability, obsessive compulsive disorder, epilepsy, attention deficit and hyperactivity disorder, and Pitt Hopkins Syndrome 2 [13–16]. The gene discussed is NRXN1; the disease is schizophrenia.