5DGI:
reference: Cellular Cations Control Conformational Switching of Inositol Pyrophosphate Analogues., Hager A, Wu M, Wang H, Brown NW Jr, Shears SB, Veiga N, Fiedler D, Chemistry. 2016 Jul 27. doi: 10.1002/chem.201601754. PMID: 27460418

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