4ZMS:
reference: Structural characterization of the full-length response regulator spr1814 in complex with a phosphate analogue reveals a novel conformational plasticity of the linker region., Park AK, Lee JH, Chi YM, Park H, Biochem Biophys Res Commun. 2016 Apr 29;473(2):625-9. doi:, 10.1016/j.bbrc.2016.03.144. Epub 2016 Mar 30. PMID: 27038544

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