Figure 2: Immunohistochemistry. Hippocampal neurons, PHF (A) and AT8 (B) with neurofibrillary tangles, in an AD patient, 100X, diaminobenzidine staining. Immunoreactivity patterns in epidermis of a control patient (C-D) and AD patient (E-F), with PFH and AT8 antibodies. 40X, amine-ethyl-carbazole staining.