Expression of PDGF-αR in the adult cerebellum and brainstem nuclei. In the adult cerebellum, the expression of PDGF-αR is detected only in the Purkinje cell layer (PL), whereas the molecular (ML) and granule cell layers (GL) remained unstained with the anti-PDGF-αR (A). B, High-magnification view of the immunoreactivity in the soma and dendritic processes of Purkinje cells. Note that PDGF-αR immunoreactivity is not found in Purkinje cell axons. C, Immunodetection of PDGF-αR in neurons of the interpositus cerebelli nucleus. D, High-power view of PDGF-αR-positive neurons of the interpositus cerebelli nucleus. E, PDGF-αR immunoreactivity in the facial nucleus. F, High-magnification view of the staining of facial nucleus neurons. Magnification: A, C,110×; B, D, 220×; E, 130×;F, 260×.