2CKW:
reference: Structural and functional characterization of sapovirus RNA-dependent RNA polymerase., Fullerton SW, Blaschke M, Coutard B, Gebhardt J, Gorbalenya A, Canard B, Tucker PA, Rohayem J, J Virol. 2007 Feb;81(4):1858-71. Epub 2006 Nov 22. PMID: 17121797

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