KCNK9 and schizophrenia: The methylation signal within three genes reportedly associated with autism disorder are shown in Figure 5C,D: SNX29, TRAPPC9, and KCNK9. SORTING NEXIN 29 (SNX29, also known as RUN Domain-Containing Protein 2A, RUNDC2A) is a gene previously associated with schizophrenia [52].