3EWP:
reference: Crystal structures of two coronavirus ADP-ribose-1''-monophosphatases and their complexes with ADP-Ribose: a systematic structural analysis of the viral ADRP domain., Xu Y, Cong L, Chen C, Wei L, Zhao Q, Xu X, Ma Y, Bartlam M, Rao Z, J Virol. 2009 Jan;83(2):1083-92. Epub 2008 Nov 5. PMID: 18987156

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