Fig. 4. Rate of ATP synthesis in mitochondria isolated from hearts exposed to ischemia/reperfusion alone (I/R), anesthetic preconditioning (APC), with or without the ROS scavengers tiron (APC + TIR, TIR) or MnTBAP (APC + TBAP, TBAP). In addition, there was a Sham group in which mitochondria were isolated from hearts not subjected to ischemia or treatment. Note that of ATP synthesis rate in mitochondria isolated from Sham and APC groups were significantly greater compared to other groups. *P < 0.05 versus I/R. Other details in text.