Finally, the only segment resulted under-expressed in PD patients DA neurons was on chromosome 15 [coordinates 92,750,001–93,250,000] (Table 2), and included one known gene RGMA encoding for a glycosylphosphatidylinositol-anchored glycoprotein, the LOC100507217 locus encoding for a ncRNA and the sequence named Hs.741028, which is to date uncharacterized. The gene discussed is RGMA; the disease is Parkinson disease.