Figure 4 of Wang, Mol Vis 2012; 18:803-815.

Figure 4. p16INK4a expression was detectable and showed similar nuclear localization in corneal endothelial cells from donors of different ages. The strength of p16INK4a expression in a young donor (A) was stronger than that in an elderly donor (B). Panels C and D represent the negative control. Magnification: 200×.