Western blots were performed as previously described (28 (link)). Blots were incubated with OPA1 antibody (Abcam) diluted 1:1000; DRP1 antibody (Abcam) diluted 1:1000; and GAPDH (Santa Cruz Biotechnology) diluted 1:3000. Signals were detected using horseradish peroxidase-conjugated secondary antibody and Luminata Crescendo Western HRP substrate reagent (Millipore). Blots were imaged using a Chemidoc Imager (Bio-Rad).