Decreased activities of aconitase and NADH dehydrogenase in the lungs of dnTrx-Tg mice in normoxia and hyperoxia. A: aconitase activity was determined as described in materials and methods. *Significantly decreased in hyperoxia compared with WT, Trx-Tg, or dnTrx-Tg in normoxia; **significantly decreased in normoxia compared with WT or Trx-Tg mice lung, P < 0.05, ANOVA, B: NADH dehydrogenase activity was determined in pulmonary tissue of WT, Trx-Tg, or dnTrx-Tg mice in normoxia and hyperoxia as described in materials and methods. *Significantly decreased compared with WT or Trx Tg mice in normoxia, P < 0.05, ANOVA.