Tumor cell killing in cell cultures by GLV-1h99. PANC-1 cells were infected with GLV-1h68 or GLV-1h99 at MOIs of 0.01 and 10. Cell viability was determined using CytoTox 96 Non-Radioactive Cytotoxicity Assay kit (Promega, Madison, WI, USA). Cell viability before infection was set at 100%. The values are the mean of quadruple samples, and the bars indicate SD. Representative of two independent experiments.