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Fig. 2. Haematoxylin-Eosin (HE) staining of horizontal tissue sections through the forebrain of E12.5 wild-type (Wt1+/+) embryos and embryos with complete disruption of Wt1 (Wt1-/-). (A-D) The olfactory epithelium is thinner in the Wt1-deficient than in the the Wt1+/+ embryo. (E,F) The vomeronasal organs (arrows) were normally developed in the Wt1-/- embryos. The tissue sections are representative for the three different animals of each group analysed. Scale bars: 100 µm.