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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 to BBP27-BBP28 (A), rrbA (dsrA ortholog) (B), and bsrA (C). In each panel, RNA from spirochetes is shown at mid-exponential growth phase (lane 1) and stationary growth phase (lane 2). Molecular sizes in base pairs are indicated to the left of each panel.
