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Spot 42 accelerates the mRNA decay rate of the 3′ end-sharing mRNA only. (A, B) Northern blots of gal mRNA from wild type (WT) MG1655 and MG1655Δspf in the presence of rifampicin (100 μg/mL) with E probe. (C, D) Northern blots of gal mRNA from wild type (WT) MG1655 and MG1655Δspf in the presence of rifampicin (100 μg/mL) with K probe.
