C9i enhances apoptosis within 4 hours following removal of BLIN-3 and BLIN-4L cells from fibroblast monolayers. Cells were cultured in DMSO (D), 50 μM C9i, or 50 μM PCi. Cells were harvested at 2-hour time points and stained with TMRE or annexin V (AV). Numbers in histograms indicate percentage of PI^- cells that underwent a loss of ΔΨm. Numbers in contour plots indicate percentage of annexin V⁺/PI^- cells.