6HLQ:
reference: The cryo-EM structure of a 12-subunit variant of RNA polymerase I reveals dissociation of the A49-A34.5 heterodimer and rearrangement of subunit A12.2., Tafur L, Sadian Y, Hanske J, Wetzel R, Weis F, Muller CW, Elife. 2019 Mar 26;8. pii: 43204. doi: 10.7554/eLife.43204. PMID: 30913026

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