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Northern blot analysis of RNA from B. burgdorferi B31. RNA samples (20 μg/lane) were separated by electrophoresis and hybridized with probes specific for p13, rnpB, or tmRNA, respectively. RNA from spirochetes is shown at mid-exponential growth phase (lanes 1) and stationary growth phase (lanes 2). Molecular sizes in base pairs are indicated on the left.
