3TWU:
reference: Structural basis and sequence rules for substrate recognition by tankyrase explain the basis for cherubism disease., Guettler S, Larose J, Petsalaki E, Gish G, Scotter A, Pawson T, Rottapel R, Sicheri F, Cell. 2011 Dec 9;147(6):1340-54. PMID: 22153077

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