Further, autoradiography studies illustrated [18F]PI-2620 co-localization with 4R tau deposits in post-mortem PSP tissue [15, 20, 25], which we further confirmed by showing [18F]PI-2620 PET to autopsy correlations of tau severity in PSP patients [25]. The gene discussed is MAPT; the disease is supranuclear palsy, progressive, 1.