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cif is cotranscribed with morB and PA2933. (A) The cif gene is predicted to belong to a three-gene operon including morB, PA2933, and cif. (B) RNA from the wild type (WT) and the Δcif and ΔPA2931 mutants was assayed using Northern blotting to determine the transcript size detected by the cif-specific probe. A single band at ∼4.2 kb was detected in the ΔPA2931 mutant.
