... Whereas induction of ctt1+and apt1 occurred in all ubiquinone-deficient strains, induction of gpx1+was not observed in any of the tested strains (Fig. 6).However, in the wild-type strain treated ... Induction of ctt1, encoding catalase, and apt1, encodinga 25 kDa protein, but not that of gpx1, encoding glutathione peroxidase,was indistinguishable in four ubiquinone-deficient mutants, indicating ... accumulation of oxidative stress in various ubiquinone-deficient strains and in the cyc1 mutant by measuringmRNA levels of stress-inducible genes and the phosphorylation level of theSpc1 MAP kinase. Induction...