Figure 2(C): Bystander cell killing was assessed by relative evaluation of annexin V staining in AZT-treated to untreated bystander eGFP-expressing PC-3 cells by flow cytometry in direct (normal) and transwell co-cultures of eGFP-transduced with TMPK-WT- or TMPK-F105-transduced PC-3 cells. Statistical significance is indicated (p<0.0001).