2 hr-survival after a single 3H-thymidine injection on E20 (anterior coronal)
Figure 112 is an anterior coronal slice through the parenchyma of the main olfactory bulb in the basal forebrain of an E20 embryo 2 hrs after exposure to 3H-thymidine—note that the angle of the slice cuts farther back ventrally into the anterior olfactory nucleus. Label uptake is heavy in the olfactory NEP, SVZ, and in the surrounding olfactory nerve. Labeled cells are sparse in the dense mitral cell layer, sandwiched between less densely-packed internal and external plexiform layers. There is heavy label uptake in the olfactory epithelium in superficial and deep locations.