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Decreased SigB activity in the pknB mutant. (A) Real-time PCR analysis of asp23 transcription in USA300, the pknB mutant, and the complemented mutant. (B) Growth of the pknB mutant at 42°C in comparison with that of the parent and complemented strains. (C) Growth of the pknB mutant complemented with the sigB gene in trans at 42°C in comparison with that of the parent and the mutant.
