5SWC:
reference: The structure, kinetics and interactions of the beta-carboxysomal beta-carbonic anhydrase, CcaA., McGurn LD, Moazami-Goudarzi M, White SA, Suwal T, Brar B, Tang JQ, Espie GS, Kimber MS, Biochem J. 2016 Oct 11. pii: BCJ20160773. PMID: 27729545

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