TXN and atrial fibrillation: Judging from the specific mitochondrial H2O2 emission when GSH/Trx are inactive (presence of AF+DNCB) or active (absence of inhibitors), with substrates PCoA/malate, the amount of ROS generated under state 4 respiration that was scavenged was 87% and 79% in Sham and diabetic, respectively, and 83% and 73% in state 3 respiration (Fig 6C).