5D5H:
reference: Insights from the Structure of Mycobacterium tuberculosis Topoisomerase I with a Novel Protein Fold., Tan K, Cao N, Cheng B, Joachimiak A, Tse-Dinh YC, J Mol Biol. 2015 Dec 3. pii: S0022-2836(15)00686-5. doi:, 10.1016/j.jmb.2015.11.024. PMID: 26655023

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).