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mRNA decay after rifampin inhibition. The inhibitor was added to exponential-phase cultures at the initiation of the experiment. At the indicated times, RNA was prepared prior to being subjected to RT-PCR analyses to determine the amounts of trxA (⋄), ompA (□), metE (▴), ilvC (×), glnA (♦), and cysK (•) mRNA that remained.
