Time course of C/EBPβ and ZTA RNA induction by bortezomib. EBV⁺ Akata cells were treated with 20nM bortezomib (BZ) and harvested at the indicated time points. RNA was isolated and subjected to real-time qPCR using primer for C/EBPβ (A) and ZTA (B). Primers for β-actin were used as an internal control. Error bars indicate SEM.