When comparing PD patients with 4+ to 0–2 detected organochlorides in post-mortem brain samples, the top five hits included hypermethylation of cg18397450 (PACS2), cg18912855 (PACS2), cg09677945 (DNAJC15) and cg1598870 (DNAJC15) and hypomethylation of cg02101742 (TFDP1). The gene discussed is DNAJC15; the disease is Parkinson disease.