5IOO:
reference: Conservation of the C-type lectin fold for accommodating massive sequence variation in archaeal diversity-generating retroelements., Handa S, Paul BG, Miller JF, Valentine DL, Ghosh P, BMC Struct Biol. 2016 Aug 31;16(1):13. doi: 10.1186/s12900-016-0064-6. PMID: 27578274

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