2KBI:
reference: Solution NMR structure of the C-terminal EF-hand domain of human cardiac sodium channel NaV1.5., Chagot B, Potet F, Balser JR, Chazin WJ, J Biol Chem. 2008 Dec 11. PMID: 19074138

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