3DVC:
reference: Role of Hydrophilic Residues in Proton Transfer during Catalysis by Human Carbonic Anhydrase II., Zheng J, Avvaru BS, Tu C, McKenna R, Silverman DN, Biochemistry. 2008 Oct 23. PMID: 18942852

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