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Double and triple immunofluorescence againts bromodeoxyuridine (BrdU) (blue), calretinin (CR) (green) and rhodamine-labeled dextran-amine (RDA) (red). Asterisks indicate newly-born olfactory granule cells co-expressing BrdU and CR and establishing contacts with RDA-labeled terminal fibers from AON (A-H), OT (I-L) and PIR (M-T). Arrowheads show contacts between BrdU+ cells and RDA-labeled fibers. Calibration bar for (A–D) 10 μm, (E–T) 20 μm.
