| 1NIK: reference: Complete, 12-subunit RNA polymerase II at 4.1-A resolution: implications for the initiation of transcription., Bushnell DA, Kornberg RD, Proc Natl Acad Sci U S A 2003 Jun 10;100(12):6969-73. PMID: 12746498 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).