Figure 2.

Accumulation of rRNA fragments in ΔdeaDΔrnr and ΔsrmBΔrnr strains. RNA was isolated from WT or mutant strains grown in LB medium at 37°C, as indicated, and analyzed by northern blotting using probes to 16S rRNA (A) or 23S rRNA (B). The full length rRNAs and rRNA degradation products are indicated.