DLGAP2 and autism: Two imprinted genes implicated in the development of autism and schizophrenia are 1) DLGAP2, a membrane-associated guanylate kinase localized at postsynaptic density in neuronal cells [109,128]; and 2) MAGI2, a multi-PDZ domain scaffolding protein that interacts with several different ligands in the brain [109,129,130], respectively.