5TJG:
reference: RNA polymerase motions during promoter melting., Feklistov A, Bae B, Hauver J, Lass-Napiorkowska A, Kalesse M, Glaus F, Altmann KH, Heyduk T, Landick R, Darst SA, Science. 2017 May 26;356(6340):863-866. doi: 10.1126/science.aam7858. PMID: 28546214

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