HEGCs from BAX^-/- mice have normal neuropeptide Y (NPY) staining.

<p><b>A</b>. 1. NPY-ir in a dorsal coronal section from a BAX^+/+ mouse shows numerous hilar neurons express NPY (arrowheads) but not GCL GCs. MOL = molecular layer. SLM = stratum lacunosum-moleculare of area CA1. Calibration = 100 µm. 2. A higher magnification illustrates the fibers in the outer molecular layer (OML) and middle molecular layer (MML; arrows), corresponding to axons of HIPP cells, the most common type of NPY-expressing cell that projects to the molecular layer. Calibration = 25 µm. <b>B</b>. 1. A section from a similar part of the hippocampus as A1, in a BAX^-/- mouse. Same calibration as A1. 2. A higher magnification of the molecular layer in B1 shows NPY-ir fibers, similar to the BAX^+/+ mouse. Same calibration as A2.