Gene expression in hippocampal formation (HF) at PCW15. (a). A Nissl-stained section showing the laminar organization of the HF. (b-p). Expression patterns of 15 genes as indicated in (b-p). Note the layer-specific gene expression in HF and the expression of VIM (i) and NTRK2 (m) in the migrating dentate-hippocampal transient cells (DHTC). VZi, inner VZ; DG, dentate gyrus; DGmo, DGgc and DGpm, molecular, granular and polymorphic layers (zones) of the DG. Scale bar: 400 μm in (p) for all panels.