Immunoblotting was carried out as previously described [Hong et al., 2018]. The following antibodies were used in this study: anti-CHOP, anti‐BiP, anti‐HO-1, and anti‐LC3, which came from Cell Signaling Technology (Beverly, MA); anti-R-BiP (Cha-Molstad et al., 2015 (link)), which came from Dr. Y.T. Kwon (Seoul National University, Korea); and anti‐actin, anti‐rabbit IgG‐horseradish peroxidase (HRP), and anti‐mouse IgG‐HRP, which came from Santa Cruz Biotechnology (Santa Cruz, CA).