FIGURE 2:
Phosphorylation of MYPT1 during apoptosis. HeLa cells were treated with DMSO, TNF/CHX, or TNF/CHX/zVAD-FMK plus Y-27632 for 3 h. Phosphorylation of endogenous MYPT1 was determined using the indicated antibody (pT696, anti–phospho-Thr-696; pT853, anti–phospho-Thr-853; or pS903, anti–phospho-Ser-903 antibody). The full-length and caspase-3–cleaved MYPT1s are indicated using filled and open arrowheads, respectively.