Evaluation of endoplasmic reticular (ER) stress by measuring the mitochondrial membrane potential (MMP) in dengue 2 virus (DENV2)-infected C6/36 cells. To measure MMP, detection of the FITC channel for green MitoCapture monomers by FACScan flow cytometry was carried out in DENV2-infected C6/36 cells (MOI = 1) with and without PERK inhibitor (5 μM) treatment. The MMP in the group treated with the PERK inhibitor had significantly increased at 48 h post-infection (hpi) (a 2.32-fold increase) compared to cells in the two control groups (1.20-fold for the untreated and 1.36-fold increases for the DMSO-treated group) (Student's t -test; *** p