4PUQ:
reference: Proteolytic Degradation of Topoisomerase II (Top2) Enables the Processing of Top2-DNA and -RNA Covalent Complexes by Tyrosyl-DNA-phosphodiesterase 2 (TDP2)., Gao R, Schellenberg MJ, Huang SY, Abdelmalak M, Marchand C, Nitiss KC, Nitiss JL, Williams RS, Pommier Y, J Biol Chem. 2014 May 7. pii: jbc.M114.565374. PMID: 24808172

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