6W6V:
reference: Cryo-EM structure of catalytic ribonucleoprotein complex RNase MRP., Perederina A, Li D, Lee H, Bator C, Berezin I, Hafenstein SL, Krasilnikov AS, Nat Commun. 2020 Jul 10;11(1):3474. doi: 10.1038/s41467-020-17308-z. PMID: 32651392

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