3B9X:
reference: Structural Basis for Substrate Specificity in Group I Nucleoside Hydrolases(,)., Iovane E, Giabbai B, Muzzolini L, Matafora V, Fornili A, Minici C, Giannese F, Degano M, Biochemistry. 2008 Mar 25;. PMID: 18361502

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