2.7.2 Metabolic assay
The content of intracellular hydrogen peroxide was measured with a
Hydrogen Peroxide Assay Kit (Beyotime, China). The
NAD+/NADH and NADP+/NADPH were
measured with a NAD+/NADH Quantification Kit and
NADP+/NADPH Quantification Kit (Sigma-Aldrich),
respectively. All kits were used according to the manufacturer’s
instructions.