2C89:
reference: Structural basis for the NAD-hydrolysis mechanism and the ARTT-loop plasticity of C3 exoenzymes., Menetrey J, Flatau G, Boquet P, Menez A, Stura EA, Protein Sci. 2008 May;17(5):878-86. Epub 2008 Mar 27. PMID: 18369192

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