Figure 8. Protein expression of p16 gene.

Human B lymphoblastoid cells and A549 cells were exposed to potassium dichromate or lead chromate for 24 hours, and p16 protein expression was analyzed by western blot with 100 µg of protein. A–B: Western blots of p16 and tublin in human B lymphoblastoid cells (A) and A549 cells (B). C–D: Histograms of Integrated Density Value for each protein in human B lymphoblastoid cells (C) and A549 cells (D), normalized to tublin. Asterisks above the bars indicate that the difference between exposure and control was significant (P<0.05).