2I2R:
reference: Three-dimensional structure of the KChIP1-Kv4.3 T1 complex reveals a cross-shaped octamer., Pioletti M, Findeisen F, Hura GL, Minor DL Jr, Nat Struct Mol Biol. 2006 Nov;13(11):987-995. Epub 2006 Oct 22. PMID: 17057713

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