We quantified the area of IBA1-TSPO and GFAP-TSPO co-localization (reflective of microglial and astrocytic TSPO levels, respectively) in posterior frontal lobe (BA6) tissue from neuropathologically confirmed PSP donors who had undergone 11CPK11195 PET during life,8,10 and control donors. The gene discussed is GFAP; the disease is supranuclear palsy, progressive, 1.