5G5S:
reference: Structural and mechanistic insights into an archaeal DNA-guided Argonaute protein., Willkomm S, Oellig CA, Zander A, Restle T, Keegan R, Grohmann D, Schneider S, Nat Microbiol. 2017 Mar 20;2:17035. doi: 10.1038/nmicrobiol.2017.35. PMID: 28319084

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