Fig. 4From: Therapeutic Potential of Delivering Arsenic Trioxide into HPV-Infected Cervical Cancer Cells Using Liposomal NanotechnologyConfocal fluorescent microscopic examinations (×400) of HPV-E6 (red) and caspase-3 (green) in HeLa, C33a and HK cells after a 48-h treatment. Cells were counter-stained with DAPI (blue) to reveal the nuclear/DNA location. a Control. b LIP. c ATO 5 μM. d ATO 5 μM + LIP. Scale bar = 20 μmBack to article page