Labeling: Positive control (“+”), negative control (“−“), phenanthriplatin (“1”), pyriplatin (“2”), cisplatin (“3”). Numbers on the left of the blot represent molecular weight in kilodaltons (kDa). Time course of experiments, i.e., 24 or 48 hours, indicated below treatment labeling. Protein band identification is given on the right. Western blot results show detection of the control, GAPDH, full length (55 kDa) caspase-12, and the cleaved form of caspase-12 (42 kDa) at 24 and 48 hours for all treatment categories.