1EXB:
reference: Structure of the cytoplasmic beta subunit-T1 assembly of voltage-dependent K+ channels., Gulbis JM, Zhou M, Mann S, MacKinnon R, Science 2000 Jul 7;289(5476):123-7. PMID: 10884227

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