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- _5 value "To inhibit myogenesis, Sir2 requires its NAD(+)-dependent deacetylase activity. The [NAD(+)]/[NADH] ratio decreases as muscle cells differentiate, while an increased [NAD(+)]/[NADH] ratio inhibits muscle gene expression. Cells with reduced Sir2 levels are less sensitive to the inhibition imposed by an elevated [NAD(+)]/[NADH] ratio. These results indicate that Sir2 regulates muscle gene expression and differentiation by possibly functioning as a redox sensor. In response to exercise, food intake, and starvation, Sir2 may sense modifications of the redox state and promptly modulate gene expression." provenance.
- _5 wasQuotedFrom 12887892 provenance.