Figure 3. 2-APB inhibited the protein expression of ER stress markers in Pb-exposed cells.

Cells were co-treated with 10 µM 2-APB and/or 0.5 µM Pb for 12 h, then harvested to measure the protein levels of GRP78 (A), GRP94 (B), CRT (C), CHOP (D) and caspase-12 (E). Upper panel representative western blot image; lower panel quantitative analysis (mean ± SEM, n = 4). ^**P < 0.01.