Activity of mitochondrial aerobic enzymes from HeLa cells expressing different levels of Hsp70. A: citrate synthase (CS); BL, n = 12; LL, n = 9; HL, n = 10. B: NADH dehydrogenase [complex I (CI)]; BL, n = 12; LL, n = 9; HL, n = 10. Open circles represent statistical outliers. C: ubiquinol:cytochrome-c reductase [complex III (CIII)]; BL, n = 12; LL, n = 4; HL, n = 7. For details, see Fig. 3. *P < 0.05 vs. BL.