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The PASA domain of KinA is required for sensing impaired respiration. (A) Colony morphologies for the wild type (3610) and mutants of KinA lacking PASA (AE253), PASB (AE254), or PASC (AE255). Colonies were grown for 72 h on MSgg medium containing 250 μM iron chloride. (B) Expression of PsinI-lacZ in colonies that had been grown in liquid MSgg medium for 48 h.
