6MBV:
reference: Carbonic anhydrase II in complex with carboxylic acid-based inhibitors., Lomelino CL, McKenna R, Acta Crystallogr F Struct Biol Commun. 2019 Mar 1;75(Pt 3):166-170. doi:, 10.1107/S2053230X18018344. Epub 2019 Feb 20. PMID: 30839290

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