Two mice unilaterally injected into the corpus callosum with sarkosyl-insoluble fractions of AD at the age of 12 months and killed at the age of 18 months showed tau deposition only in glial cells and threads of the ipsilateral (D), middle region (E) and contralateral (F) corpus (Figures 2D–F). The gene discussed is MAPT; the disease is Alzheimer disease.