Figure 1. Mitochondrial mass increases in DFs from LLI. (A) Citrate synthase activity expressed as nmol/min/mg of total cellular protein; (B) protein content expressed as μg protein/106 cells ratio; (C) citrate synthase activity expressed as nmol/min/106 cells; *p<0.05 LLI vs Old and **p<0.01 LLI vs Young. Data are presented as the mean value ± SD. Two independent experiments were performed on DFs of each donor.