MAPT and Alzheimer disease: Finally, in accordance to what was found for control human brains (Fig. 2d, e), we confirmed that W-Tau antibody was able to specifically immunoprecipitate W-Tau protein from human brain in extracts from AD patients (Braak stages V and VI) that could be identified as Tau again with a total Tau antibody (Tau 7.51) (Fig. 7a).