Positivity appears mostly confined to two regions: the Mitral cell layer and the external granular layer.

Positivity ( nuclear) appears to be confined to T-cells.

Lower epithelium is respiratory, in the nasal cavity.

Positive nuclei at the top of the image are within the developing olfactory bulb.

Parasagittal section ( region of eye)

Apologies for the uneven illumination.

For this antibody, Citric acid HIER is not as good as Formic acid AR.