2BH2:
reference: A unique RNA Fold in the RumA-RNA-cofactor ternary complex contributes to substrate selectivity and enzymatic function., Lee TT, Agarwalla S, Stroud RM, Cell. 2005 Mar 11;120(5):599-611. PMID: 15766524

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