4QLM:
reference: c-di-AMP binds the ydaO riboswitch in two pseudo-symmetry-related pockets., Ren A, Patel DJ, Nat Chem Biol. 2014 Aug 3. doi: 10.1038/nchembio.1606. PMID: 25086509

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