SIRT3 enzymatic activity was assayed with the Fluorogenic SIRT3 assay kit (BPS Bioscience, CA, USA) following the manufacturer’s instructions, with slight modifications. Mitochondrial protein (1 μg) was incubated at 37°C for 45 min with specific substrates; 25 μl of developer was added; and after 45 min of incubation, SIRT3 activity was measured using a fluorimetric microplate reader at 360 nm/460 nm.
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