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Differential expression in new Mzr lines of genes associated with reduction of 5-NI drugs. The indicated cells were examined by real-time PCR for mRNA levels of PFOR, ferredoxin 1 (Fdx1), nitroreductase 2 (NR2), and thioredoxin reductase (TrxR). Expression levels are shown relative to those in the parental WB cells (means + SEM; n = 3 to 4 per group). *, P < 0.05 (t test) relative to WB.
