4KSY:
reference: Cyclic GMP-AMP Containing Mixed Phosphodiester Linkages Is An Endogenous High-Affinity Ligand for STING., Zhang X, Shi H, Wu J, Zhang X, Sun L, Chen C, Chen ZJ, Mol Cell. 2013 Jun 3. pii: S1097-2765(13)00409-7. doi:, 10.1016/j.molcel.2013.05.022. PMID: 23747010

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