Mitochondria were isolated from HEK293 cells as previously described [18 (link)]. Briefly, 60 cm plates of HEK293 cells were collected by adding 5 mL of homogenization buffer (300 mmol/L sucrose, 10 mmol/L HEPES-KOH, 1 mmol/L EGTA-KOH, pH 7.4) with 1 mg Subtilisin A protease from Bacillus licheniformis (Sigma-Aldrich). A detailed protocol for mitochondria isolation can be found in our previous published manuscript [18 (link)].
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