All Three Endogenous Quinone Species of Escherichia coli Are Involved in Controlling the Activity of the Aerobic/Anaerobic Response Regulator ArcA.

However, the level of phosphorylated ArcA in this strain is lower than in the wild type and in AV34 (the UQ-only strain), but here too, a clear trend during the anarobiosis/aerobiosis transition could be observed ( Figure 4C ).

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