Caco-2 and HepG2 treated cells stained with acridine orange and ethidium bromide. Figure A shows Caco-2 cells while figure B shows HepG2 cells. (a) The untreated live cells showed normal green nuclei. (b) FGKC, (c) DKC, (d) CGKC and (e) tamoxifen-treated cells showed apoptosis, with bright green condensed nuclei and orange nuclei. Orange arrow: nucleus fragmentation. Blue arrow: chromatin condensation. Red arrow: apoptotic bodies. Light green arrow: necrotic cells.