ER stress inducers activate KSHV lytic gene expression. KSHV BC-3 cells were treated with DMSO, 20nM bortezomib (20nm BZ), 1mM thapsigargin (1mM TG) or 72uM nelfinavir. RNA was isolated and RT-PCR was performed using primers for RTA. Primers for β-actin were used as an internal control. Error bars indicate SEM.