| 1I7D: reference: Crystal structure of a complex of a type IA DNA topoisomerase with a single-stranded DNA molecule., Changela A, DiGate RJ, Mondragon A, Nature 2001 Jun 28;411(6841):1077-81. PMID: 11429611 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).