6RYA:
reference: Regulation of Phosphoribosyl-Linked Serine Ubiquitination by Deubiquitinases DupA and DupB., Shin D, Mukherjee R, Liu Y, Gonzalez A, Bonn F, Liu Y, Rogov VV, Heinz M, Stolz A, Hummer G, Dotsch V, Luo ZQ, Bhogaraju S, Dikic I, Mol Cell. 2020 Jan 2;77(1):164-179.e6. doi: 10.1016/j.molcel.2019.10.019. Epub, 2019 Nov 12. PMID: 31732457

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