4XJ3:
reference: Structural Basis for the Catalytic Mechanism of DncV, Bacterial Homolog of Cyclic GMP-AMP Synthase., Kato K, Ishii R, Hirano S, Ishitani R, Nureki O, Structure. 2015 Apr 1. pii: S0969-2126(15)00078-7. doi:, 10.1016/j.str.2015.01.023. PMID: 25865248

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