Figure 2. A) Apoptosis and (B) proliferation in macrophages (left panel) and SMCs (right panel) in the atherosclerotic lesions of Rb^fl (black bars) and Rb^del (white bars) mice. Error bars indicate SEM *P < 0.05. C) Representative Ki-67 stained lesions of Rb^fl (left panel) and Rb^del (right panel) mice. Arrows indicate Ki-67 positive cells. Magnification 150x, scale bar 150 µm.