5MX4:
reference: Structural characterization of purine nucleoside phosphorylase from human pathogen Helicobacter pylori., Stefanic Z, Mikleusevic G, Luic M, Bzowska A, Lescic Asler I, Int J Biol Macromol. 2017 Mar 20;101:518-526. doi:, 10.1016/j.ijbiomac.2017.03.101. PMID: 28336275

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