5FGU:
reference: Structural characterization of the virulence factor Sda1 nuclease from Streptococcus pyogenes., Moon AF, Krahn JM, Lu X, Cuneo MJ, Pedersen LC, Nucleic Acids Res. 2016 May 5;44(8):3946-57. doi: 10.1093/nar/gkw143. Epub 2016, Mar 11. PMID: 26969731

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