To measure the levels of glycolytic ATP production, 1 × 104 cells were seeded into each well of black 96-well plates. To normalize the levels of protein, the same number of cells were seeded into clear bottom 96-well plates. Cells were incubated in medium containing 1 μM oligomycin (Sigma-Aldrich) to inhibit mitochondrial oxidative ATP production or 25 mM 2-deoxy-D-glucose (2-DG) to inhibit glycolytic ATP production. After washing the cells with PBS, ATP levels were measured using a kit according to the manufacturer’s protocol (PerkinElmer). Total ATP production was calculated by subtracting the amount of ATP in cells treated with both oligomycin and 2-DG from the amount of ATP in cells without treatment. To normalize the number of cells, the protein concentration was measured using the Bicinchoninic Acid Protein Assay Kit (BCA, Sigma-Aldrich) according to the manufacturer’s protocols.
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