3BPZ:
reference: C-terminal movement during gating in cyclic nucleotide-modulated channels., Craven KB, Olivier NB, Zagotta WN, J Biol Chem. 2008 May 23;283(21):14728-38. Epub 2008 Mar 26. PMID: 18367452

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