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Different states of the AcnR repressor. Left, scheme of the different functional forms found in TetR repressor and those found in this work for AcnR. Right, comparison of the two independent AcnR protomers in the asymmetric unit (blue and coral) in crystal Form II. The two protomers are superposed, and the movements of α6 and the DBD relative to the LBD are evident.
