Figure 3From: Canine distemper virus induces apoptosis in cervical tumor derived cell linesImmunocytochemistry experiment control: No staining was observed in the experiment negative control consisted of HeLa cells treated with cisplatin (40 μM) incubated with TBS+2%BSA, instead the primary antibody for caspase -3 or -8 (Microscope objective 63 × 1.23).Back to article page