Figure 4: Gene expression studies with muscle cell lines demonstrating regulation of the oxidative phosphorylation system. (a) Mitochondrial DNA-encoded oxidative phosphorylation subunits. (b) Gene expression of nuclear DNA-encoded oxidative phosphorylation subunits. (c) Mitochondrial biogenesis-related transcription factors. Statistically significantly different from other groups *P < 0.05, **P < 0.01