5NWT:
reference: TRANSCRIPTION. Structures of the RNA polymerase-sigma54 reveal new and conserved regulatory strategies., Yang Y, Darbari VC, Zhang N, Lu D, Glyde R, Wang YP, Winkelman JT, Gourse RL, Murakami KS, Buck M, Zhang X, Science. 2015 Aug 21;349(6250):882-5. doi: 10.1126/science.aab1478. PMID: 26293966

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