4EPP:
reference: Structure and mechanism of a canonical poly(ADP-ribose) glycohydrolase., Dunstan MS, Barkauskaite E, Lafite P, Knezevic CE, Brassington A, Ahel M, Hergenrother PJ, Leys D, Ahel I, Nat Commun. 2012 Jun 6;3:878. doi: 10.1038/ncomms1889. PMID: 22673905

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