Propagation of humantau protein to neurons in the DG (white arrows) in ECrTgTau-Mapt0/0 mice. Close-ups show DG neurons from three ECrTgTau-Mapt0/0 mice (DG I-III). Immuno-FISH proofs the absence of humantau expression in DG neurons, which have huTau protein but no humantau mRNA. Scale bars 50 μm. 