| 5ZAD: reference: Increasing the distance between two monomers of topoisomerase IIbeta under the action of antitumor agent 4beta-sulfur-(benzimidazole) 4'-demethylepipodophyllotoxin., Sun LY, Zhu LW, Tang YJ, Sci Rep. 2018 Oct 8;8(1):14949. doi: 10.1038/s41598-018-33366-2. PMID: 30297860 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).