1L7O:
reference: Structural characterization of the reaction pathway in phosphoserine phosphatase: crystallographic "snapshots" of intermediate states., Wang W, Cho HS, Kim R, Jancarik J, Yokota H, Nguyen HH, Grigoriev IV, Wemmer DE, Kim SH, J Mol Biol 2002 May 31;319(2):421-31. PMID: 12051918

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