Incubation forsurvival = live cell number (test)/live cell number (control) ?Page 3 of(page number not for citation purposes)Journal of Translational Medicine 2007, 5:http://www.translational-medicine.com/content/5/1/min at 37 with 1 Triton X-100. Cell lysates were harvested and centrifuged at 1,800 rpm for 5 min. The amount of cell-associated HIV-1 was evaluated using p24 antigen capture ELISA.