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Northern blot analysis of fsrB deletion mutant (TX5266). RNA from postexponential-phase cultures of OG1RF and the fsrB deletion mutant (TX5266) was isolated as described in Materials and Methods. Northern blots were probed with the fsrC probe. Arrow, band that hybridized with the fsrC probe. Lanes: O, OG1RF; ΔB, fsrB deletion mutant TX5266 (deleted from bp 79 to 684 in fsrB).
