2PTA:
reference: Solution structure for Pandinus toxin K-alpha (PiTX-K alpha), a selective blocker of A-type potassium channels., Tenenholz TC, Rogowski RS, Collins JH, Blaustein MP, Weber DJ, Biochemistry 1997 Mar 11;36(10):2763-71. PMID: 9062103

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