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Transcription of PaAox is reduced by the addition of paraquat and hydrogen peroxide. (A and B) Northern blot analysis of PaAox transcripts in the wild-type strain and in mutant grisea. Paraquat (Pq, 100 μM) was added to the medium 15, 30, 60, and 240 min before RNA preparation. (C and D) H2O2 (0.01%) was added to the medium 15, 30, 60, 240, and 960 min before RNA preparation. These cultures were grown in the dark.
