6Q00:
reference: Ubiquitin stimulated reversal of topoisomerase 2 DNA-protein crosslinks by TDP2., Schellenberg MJ, Appel CD, Riccio AA, Butler LR, Krahn JM, Liebermann JA, Cortes-Ledesma F, Williams RS, Nucleic Acids Res. 2020 May 1. pii: 5827663. doi: 10.1093/nar/gkaa318. PMID: 32356875

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