3W9S:
reference: Structural Basis of a Physical Blockage Mechanism for the Interaction of Response Regulator PmrA with Connector Protein PmrD from Klebsiella pneumoniae., Luo SC, Lou YC, Rajasekaran M, Chang YW, Hsiao CD, Chen C, J Biol Chem. 2013 Aug 30;288(35):25551-61. doi: 10.1074/jbc.M113.481978. Epub, 2013 Jul 16. PMID: 23861396

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