1W53:
reference: Functional and structural characterization of RsbU, a stress signaling protein phosphatase 2C., Delumeau O, Dutta S, Brigulla M, Kuhnke G, Hardwick SW, Volker U, Yudkin MD, Lewis RJ, J Biol Chem. 2004 Sep 24;279(39):40927-37. Epub 2004 Jul 19. PMID: 15263010

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