1MME:
reference: The crystal structure of an all-RNA hammerhead ribozyme: a proposed mechanism for RNA catalytic cleavage., Scott WG, Finch JT, Klug A, Cell 1995 Jun 30;81(7):991-1002. PMID: 7541315

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