Fig. 5. Purkinje cell dendritic development is abnormal in Ccnd1^-/- mice at P9. Comparison of wild-type (A,C) and Ccnd1^-/- (B,D) Purkinje cells stained with anti-calbindin antibody shows that at P9 (A,B), Ccnd1^-/- Purkinje cell dendrites are abnormally oriented and stunted, but by 4 weeks (C,D) they look normal. Scale bars: 50 µm in A,B; 100 µm in C,D.