4MKP:
reference: Structural and Functional Analyses of DNA-Sensing and Immune Activation by Human cGAS., Kato K, Ishii R, Goto E, Ishitani R, Tokunaga F, Nureki O, PLoS One. 2013 Oct 7;8(10):e76983. doi: 10.1371/journal.pone.0076983. PMID: 24116191

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