COL15A1 and supranuclear palsy, progressive, 1: Furthermore, M29 exhibited overrepresentation of genetic risk with 30 candidate risk‐associated gene products, like B3GAT2, ARID4B, SDC4, and COL15A1, and finally M47 harbored 37 nominally significant PSP risk genes, including PF4, FBXW7, SERAINEF2, and A2M.