4QWQ:
reference: Structure of the DNA-binding domain of the response regulator SaeR from Staphylococcus aureus., Fan X, Zhang X, Zhu Y, Niu L, Teng M, Sun B, Li X, Acta Crystallogr D Biol Crystallogr. 2015 Aug 1;71(Pt 8):1768-76. doi:, 10.1107/S1399004715010287. Epub 2015 Jul 31. PMID: 26249357

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