5BQ1:
reference: Carbon Dioxide "Trapped" in a beta-Carbonic Anhydrase., Aggarwal M, Chua TK, Pinard MA, Szebenyi DM, McKenna R, Biochemistry. 2015 Nov 3;54(43):6631-8. doi: 10.1021/acs.biochem.5b00987. Epub, 2015 Oct 16. PMID: 26457866

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