| 4ZBM: reference: Structural implications of weak Ca2+ block in Drosophila cyclic nucleotide-gated channels., Lam YL, Zeng W, Derebe MG, Jiang Y, J Gen Physiol. 2015 Aug 17. pii: jgp.201511431. PMID: 26283200 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).