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Expression of speA, speB, and mf. RNA (20 μg), extracted from H305 at the mid-log (ML), late log (LL), and stationary (ST) phases of growth, was hybridized to DIG-labelled PCR probes for speA (A), speB (B), and mf mRNAs. Photographs of ethidium bromide-stained gels are shown below the corresponding Northern blots.
