Thapsigargin: sc-24017. Immunofluorescence staining of methanol-fixed HeLa cells showing mitochondrial staining of pro-caspase-9 (A) and cytoplasmic and nuclear staining of caspase-9 p10 in HeLa cells treated with Thapsigargin (B). Antibody tested: caspase-9 p10 (F-7): sc-17784.