Double‐labeling of Olig2 (nuclear) with the microglial markers CD68 (brown; A) and tomato lectin (TL, red; D), glial fibrillary acidic protein (GFAP)‐positive astrocytes (red; B), microtubule associated protein‐2 (MAP‐2)‐positive neurons (red; C), and vimentin‐positive immature astrocytes (red; E), showed no co‐localization. There was co‐localization, however, between Olig2 and the mature oligodendrocyte lineage (OL) marker Adenomatous Polyposis Coli (APC) (red; F). For images A–E, arrows indicate Olig2 and arrow heads indicate other markers. For image F, the arrow indicates the mature OL (Olig2+/APC+), whereas the arrowhead indicates the immature OL (Olig2+/APC−). All images are at 400× magnification. Scale bar = 50 µm.