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Olfactory lamellae of adult zebrafish, dorsal view. Immunohistochemical detection of BDNF: (a,b) peroxidase method, (c,d) immunofluorescence method. (a–d) Elongated sensory cells in sensory segment of olfactory lamellae show immunoreactivity to BDNF. (a,c) Scale bar 50 µm. (b,d) Scale bar 5 µm.
