1QDW:
reference: The polar T1 interface is linked to conformational changes that open the voltage-gated potassium channel., Minor DL, Lin YF, Mobley BC, Avelar A, Jan YN, Jan LY, Berger JM, Cell 2000 Sep 1;102(5):657-70. PMID: 11007484

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