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Northern blots probed with DNA fragment containing RNAIII, arlR, or mgrA. RNA samples were isolated at 4 h and 8 h from (lanes 1) Newman(pTL3618), (lanes 2) ΔsbcDC mutant complemented strain CYL6621(pZC3624), and (lanes 3) ΔsbcDC mutant CYL6621(pZC3618). rRNA as a loading control is shown below each blot.
