1A31: Human Reconstituted Dna Topoisomerase I In Covalent Complex With A 22 Base Pair Dna Duplex
reference: Crystal structures of human topoisomerase I in covalent and noncovalent complexes with DNA., Redinbo MR, Stewart L, Kuhn P, Champoux JJ, Hol WG, Science 1998 Mar 6;279(5356):1504-13. PMID: 9488644

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