FIGURE 22.

Cytoarchitecture and gene expression of olfactory bulb (OB) and anterior olfactory nucleus (AON) at PCW 21. The sections were shown from rostral (a‐c), intermediate (d‐g), and caudal (h‐j) levels with different stains indicated on each panel. The layers of OB and internal plexus layer (ip) can be clearly identified at PCW 21. As at PCW15, AON strongly expresses GAP43, GRIK2, and ENC1 but negative for CALB2. Note the scattered patches (#s in e‐g) which express marker genes for AON (e.g., GAP43 and ENC1). Scale bar: 200 μm in (j) for all panels