The rates of oxygen consumption (OCR) in various cybrid cell lines were measured with a Seahorse Bioscience XF-96 extracellular flux analyzer (Seahorse Bioscience), as detailed previously (61 (link),62 (link)). Cybrid cells were seeded at a density of 2 × 104 cells per well on Seahorse XF96 polystyrene tissue culture plates (Seahorse Bioscience). Inhibitors were used at the following concentrations: oligomycin (1.5 μM), carbonyl cyanide 4-trifluoromethoxy-phenylhydrazone (FCCP) (0.8 μM), antimycin A (1.5 μM) and rotenone (3 μM).