5HPJ:
reference: A High-Resolution Crystal Structure of a Psychrohalophilic alpha-Carbonic Anhydrase from Photobacterium profundum Reveals a Unique Dimer Interface., Somalinga V, Buhrman G, Arun A, Rose RB, Grunden AM, PLoS One. 2016 Dec 9;11(12):e0168022. doi: 10.1371/journal.pone.0168022., eCollection 2016. PMID: 27936100

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