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Northern blot analysis of fsr and sprE mutants. (A, B, C, and D) Northern blots of mutants using fsrB, fsrC, gelE, and sprE probes, respectively. Lanes: o1, mutant with disruption of orf1; o, OG1RF; a, mutant with disruption of fsrA; b, mutant with disruption of fsrB; c, mutant with disruption of fsrC; s, mutant with disruption of sprE.
