1QQI:
reference: Structural comparison of the PhoB and OmpR DNA-binding/transactivation domains and the arrangement of PhoB molecules on the phosphate box., Okamura H, Hanaoka S, Nagadoi A, Makino K, Nishimura Y, J Mol Biol 2000 Feb 4;295(5):1225-36. PMID: 10653699

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