| 4OPK: reference: Generating Crystallographic Models of DNA Dodecamers from Structures of RNase H:DNA Complexes., Egli M, Pallan PS, Methods Mol Biol. 2016;1320:111-26. doi: 10.1007/978-1-4939-2763-0_8. PMID: 26227040 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).