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The occipital lobe of an age-matched subject (T3283) (A), the occipital lobe of a memory-affected subject (I1112) (B), and temporal lobe (C). Sections have been treated with a polyclonal serum against human p-tau pT231 and stained with DAB. Arrows indicate the presence of pT231 in the cytoplasm of nerve cells. Scale bars: 60 μm.
