4MB8:
reference: Evolutionary history and metabolic insights of ancient mammalian uricases., Kratzer JT, Lanaspa MA, Murphy MN, Cicerchi C, Graves CL, Tipton PA, Ortlund EA, Johnson RJ, Gaucher EA, Proc Natl Acad Sci U S A. 2014 Mar 11;111(10):3763-8. doi:, 10.1073/pnas.1320393111. Epub 2014 Feb 18. PMID: 24550457

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