| 5I2D: reference: Structural basis of transcription activation., Feng Y, Zhang Y, Ebright RH, Science. 2016 Jun 10;352(6291):1330-3. doi: 10.1126/science.aaf4417. PMID: 27284196 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).