Among the genes implicated in schizophrenia are gamma-aminobutyric acid A receptor beta 2 (GABRB2) and Erb-B2 Receptor Tyrosine Kinase 4 (ERBB4), which encode the Gamma-Aminobutyric Acid Type A Receptor Beta2 Subunit and the Erb-B2 Receptor Tyrosine Kinase 4, respectively. Here, ERBB4 is linked to schizophrenia.