4YJK:
reference: Concerted action of two subunits of the functional dimer of Shewanella oneidensis MR-1 uridine phosphorylase derived from a comparison of the C212S mutant and the wild-type enzyme., Safonova TN, Mordkovich NN, Veiko VP, Okorokova NA, Manuvera VA, Dorovatovskii PV, Popov VO, Polyakov KM, Acta Crystallogr D Struct Biol. 2016 Feb;72(Pt 2):203-10. doi:, 10.1107/S2059798315024353. Epub 2016 Jan 22. PMID: 26894668

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