5V3I:
reference: Structural Basis for Substrate Helix Remodeling and Cleavage Loop Activation in the Varkud Satellite Ribozyme., DasGupta S, Suslov NB, Piccirilli JA, J Am Chem Soc. 2017 Jul 19;139(28):9591-9597. doi: 10.1021/jacs.7b03655. Epub, 2017 Jul 3. PMID: 28625058

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